CA1060356A - Method of relubricating a track link hinge joint - Google Patents
Method of relubricating a track link hinge jointInfo
- Publication number
- CA1060356A CA1060356A CA311,695A CA311695A CA1060356A CA 1060356 A CA1060356 A CA 1060356A CA 311695 A CA311695 A CA 311695A CA 1060356 A CA1060356 A CA 1060356A
- Authority
- CA
- Canada
- Prior art keywords
- bore
- lubricant
- track
- cavity
- nozzle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
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- Pivots And Pivotal Connections (AREA)
Abstract
Abstract of the disclosure A method of relubricating a track link hinge joint formed by adjacent track links connected for pivotal interaction by means of a track pin carried by one link extending co-axially through a bushing carried by an adjacent track link, wherein the track pin has a lubricant retaining bore extending axially there-through with passages extending from the bore to the outer surface of the track pin adjacent the bushing for passing lubricant from the bore to lubricate the surface and seals positioned within each end of the bore for retaining lubricant therein. The method comprises passing a first seal positioned at one end of the bore through the bore into the position of a second seal at the opposite end thereof to expel the second seal from the bore so that the bore is open at one end.
Lubricant is then inserted into the bore through the open end thereof. The open end of the bore is then sealed to retain the lubricant therein.
Lubricant is then inserted into the bore through the open end thereof. The open end of the bore is then sealed to retain the lubricant therein.
Description
~06~)356 mis invention relates to a method of relubricating a track link hinge joint at the contact surface between a track pin and a track link bushing.
This application is a divisional of application Serial No. 266,081 filed ~ovember 19, 1976.
More specifically this invention relates to a track link hinge joint lubricating system wherein the supply of lubricant is contained within a sealed track pin and can be quickly and easily replenished in the field without necessit-ating replacing any parts of the lubricating system.
Track-type vehicles are frequently used under condi-tions wherein the terrain is such that a track is required to enable vehicle operation. These vehicles utilize a plurality of track links connected into two parallel endless chains at a track link hinge joint. Track pins span the space between the parallel sides of the links joining complementary ends of adja-cent links. One end of each track link is formed with a track link bushing through which the track pin passes to join adja-cent links for permitting relative pivotal movement therebetween.
~o In typical track-type vehicle operational environment, for example sand, dust or mud, much abrasive material is present which creates severe wear problems on the track components. mis operational atmosphere causes the track link hinge joint to wear due to entry of abrasive material into the joint which increases surface abrasion of the relatively movable parts shortening oper-ating life. Great stresses are exerted upon the track chains and, therefore, the track link hinge joints by the extremely heavy load supported by the track chain and the nature of the terrain over which the track-type vehicles commonly operate.
Under these conditions the track joints are extremely sus-ceptible to the abrasive material wear.
Various attempts have been made to increase thelife of
This application is a divisional of application Serial No. 266,081 filed ~ovember 19, 1976.
More specifically this invention relates to a track link hinge joint lubricating system wherein the supply of lubricant is contained within a sealed track pin and can be quickly and easily replenished in the field without necessit-ating replacing any parts of the lubricating system.
Track-type vehicles are frequently used under condi-tions wherein the terrain is such that a track is required to enable vehicle operation. These vehicles utilize a plurality of track links connected into two parallel endless chains at a track link hinge joint. Track pins span the space between the parallel sides of the links joining complementary ends of adja-cent links. One end of each track link is formed with a track link bushing through which the track pin passes to join adja-cent links for permitting relative pivotal movement therebetween.
~o In typical track-type vehicle operational environment, for example sand, dust or mud, much abrasive material is present which creates severe wear problems on the track components. mis operational atmosphere causes the track link hinge joint to wear due to entry of abrasive material into the joint which increases surface abrasion of the relatively movable parts shortening oper-ating life. Great stresses are exerted upon the track chains and, therefore, the track link hinge joints by the extremely heavy load supported by the track chain and the nature of the terrain over which the track-type vehicles commonly operate.
Under these conditions the track joints are extremely sus-ceptible to the abrasive material wear.
Various attempts have been made to increase thelife of
- 2 - ~
~0603S6 the track link hinge joint by such means as improYed mettallurgy and herme~ic sealing and lubricating the joints. ~owever, pro-duction costs of such systems have been such that these solutions are not commercially satisfactory. Seals have been developed which protect, with varying degrees of e~Pecti~eness, against the entry of abrasives into the track link hinge joint and retain lubricant within the joint to minimize abrasion between the track pin and the track link bushing~ Bores in the track pin have been used for retaining and storing lubricant, but precision machining costs and in-the-field machine downtime, which has been heretofor requàred or replenishing the lubricant within the track pin, r~ have rendered such systems unsatisfactory. Threaded and pressed-in steel plugs hava been used but the material cost, and time and trouble in removing worn and corroded plugs when servicing t~.e track links in the field, are both prohibitive and impractical.
Other types of plug systems have also been u~ilized, but require the replacement of a component of the seal assembly when reple-nishing the lubrican~. Such systems axe undesirable since they require maintaining a supply of replacement parts for field ser~icing.
Other problems are created when using a bore formed in the track pin to retain lubricant. Air trapped within the track pin cavity is compxessed by tha addition of lubricant so that th~
in~ernal pxessuxe within the cavity increases expelling lubricant from the track pin cavity upon the removal of the lubricant nozzle. Since the lubricant cavity is not vented to atmosphere when lubricant is added, many times an inadequate supply of lub ricant results.
SUMMAR~ OF TH~ INVENTION
It is, therefore, an object of this invention to improv~
track link hinge joint lubxication systems.
Another object of this invention is to main~ain a reple~-)3S6 ishable supply of lubricant in the track link joints without requiring the replacement of seals or lubrication plugs.
A further object of this invention is to minimize machine downtime required for field lubrication of track link joints.
Still another object of this invention is to uniformly fill the lubricant xetaining cavity of the track pin.
These and other objects are attained in accordance with the present invention wherein there is provided a sealed track pin and track link bushing lubrication system wherein lubricant is carried within the track pin and is readily replenished in the field without requiring a replacement seal.
In accordance with a further broad aspect of the present invention, there is provided a method of relubricating a track link hinge joint formed by adjacent track links connected for pivotal interaction by means of a track pin carried by one link extending co-axially through a bushing carried by an adjacent track link, wherein the track pin has a lubricant retaining bore extending axially therethrough with passages extending from the bore to the outer surface of the track pin adjacent the bushing for passing lubricant from the bore to lubricate the surface and seals positioned within each end of the bore for retaining lubricant therein. The method comprises passing a first seal positioned at one end of the bore through the bore into the position of a second seal at the opposite end thereof to expel the second seal from the bore so that the bore is open at one end. Lubricant i6 then inserted into the bore through the open end thereof. The open end of the bore is then sealed to retain the lubricant therein.
~06~356 DESCRIPTION O~ THE DRAWINGS
Further objects of the invention, together with addition~
al features contributing thereto and advantages accruing therefrom will be apparent from the following description of one embodiment of the invention when read in conjunction with the accompanying drawings, wherein: Fig. 1 is a cross-sectional view of a track link hLnge joint taken along the axis of the track pin showing the track link joint in a serviced condition, Fig. 2 is a cross-sec~ional view of a track link hinge joint taken along the axis o~ the track pin showing the track link hinge joint during field servicing in preparation for new lubricant to be added to the track pin cavity; and Fig. 3 is a cross-sectional view of a track link hinge joint taken along the axis of the track pin showing a lubrication nozzle and the manner in which the lubricant within the track pin is replenished during servicing.
DESCRIPTION OF A PREFERRED EMBODIMENT
Referring now to Fig. 1 there is shown a track link hinge joint 20 formed by a track pin 10 articulately coupling spaced trac~ links 15 which carry ground engaging track shoes ~O ~not shown) to form an endless track for supporting a vehicle.
- 4a -iO356 ¦ The track pin 10 couples adjacent track links, one to ~he other, and permits relative pivotal movement between the links through the coupling of ~rack link bushings 16, fixedly secured a~ one end of each track link, to the adjacent track link through track pin 10 fixedly secured in complementary end portions 11 o~ the adjacent link. Since relative movement be~ween the track lin~
bushing 16 and the track pin 10 is necessary for operation of the txack laying vehicle, suitable lubricant must be provided in a space 18 deined by the outer surface of the track pin 10 and ~he inner surface of the track link bushing 16 to prevent metal-to-m~tal contact for minimizing wear and frictional losses as well as reducing the noise level of the machine operation.
" The track pin 10 has a rifle drilled hole or bore 12 traversing the length of the pin at the approximate center line 1~ or axis to form a lubricant retaining cavity. A pair of cross-drilled holes 13, foxmed in the wall o~ the tracX pin, allowcommunication between the bore 12 in the center of the pin and the outer surface thereof at a poin~ adjacent to the inner surface of the track link bushing 16. When lubricant is added to the lubricant cavity 12 of the track pin, the lubricant will move outwardly through the cross-drilled linking holes 13 into the space 18 formed between the outer surface of the track pin 10 and the inner surace of the track link bushing 16 providing a film of lubricant to prevent metal-to-metal contact between the pin 2S and bushing. A pair of seals 19 are positioned adjacent the outer end of the track link bushing 16 to provide a lubricant proof seal between the track pin and the track link bushing. The seals 18 maintain the lubrican~ between the outer surface of the track pin and the adjacent inner surface of the track link bushing and prevent abrasive materials from entering between these surfaces.
A pair of resilient elastomeric plugs 22 and 23, which are of a material not deleteriously affected by ~he lubricant, axe secured in both ends of the track pin 10 to seal ~he lubrican~ containing cavity 12.
After a period of operation, it becomes desirable or necessary to replenish or replace the lubricant retained within the track pin cavity 12. Referring to Fig. 2, access to the lubricant cavity 12, to replenish or replace the lubricant, is accomplished by a plug driving tool 30 formed as a cylindrical rod 31 o a diameter slightly less than that of the internal bore and ex~ending a length equal to that of the ~rack pin less the length of one of the equal size plugs 22 or 23. A roll pin or suitable stop 32 is secured in the plug driving tool to insure ~hat the tool, when inserted in the track pin 10, extends only this predetermined length for a purpose to be hereinafter describe~
in detail.
Replenishment of the lubricant within the track pin lubricant cavity 12 is accomplished by utilizing the plug driving tool 30 to drive one of the plugs 22 or 23 through the internal bore or lubricant cavity in the track pin 10 into the position previously occupied by the plug at the opposite end of the bore 12 ~ tqhile repacking can be effected from either side of ~he track pin 10, in Fig. 2 the plug driving tool 30 has been inserted from the le~ end and has driven plug 22 from the left to the right side into the position of and replacing plug 23. Plug 23 is removed by ~his action and can be reinserted from the left end in the ~5 position o and replacing plug 22 to again close the lubricant cavity 12 after repacking. The roll pin or stop 32 for the plug dri~ing tool 30 is positioned to insure that the length of the driving tool inserted into the track pin 10 will position plug 22 in the same position as formerly occupied by plug 23. The bore 1 of track pin is then ready for replacement of the lubricant.
New lubricant is added to the lubricant chamber 12 by means o~ a lubricant nozzle-40 which is inserted into the track 1C~6V3S6 pin lubrication caYity through the open end. The lubrication nozzle is inserted into the open end of the ca~ity 12 and lubrica~t added until such time as the lubricant begins to pass from an overflow port 41 in the lubricant nozzle indicating that the internal chamber 12 has been ~illed. The lubricant nozzle 40 is then removed from the lubricant cavity 12 and plug 23 inserted to reseal the cavity.
Since the lubrication nozzle is vented to the atmospher~
remov~l o~ ~he nozzle ~rom the cavity will not cause the lubricant to be blown rom the cavit~ due to internal pressure within the track pin bore 12. Internal pre~sure wi~hin the track pin cavity 12 can also create a plug of lubricant which would appear to in-dicate that the track pin cavity 12 is full when in fact the cavit~
is empty except for the plug o lubricant so formed. The track pin lubrication ~ozzle 40 prevents such pressure build-up by vent-àng the chamber 12 to atmosphere.
The lubrication nozzle 40 is formed with a stepped or insert portion 42 of a diameter slightly less than the internal bore o~ the lubricant chamber 12 and extending a length determined by a shoulder 49 formed on the nozzle. The insert portion 42 includes a pair of spaced lands 43 each carrying "O" rings or o~her suitable seal 44 for forming a lubricant tight sealing re-lationship between the internal surfaces of the lubricant chamber 21 and the seal rings 44. A stepped portion 45 formed by the two lands is in communication with a longitudinally extending bore 46, an outer portion o~ which (47) is adapted ~or coupling to a suit-able lubricant supply, not shown.
As shown in Fig. 3, when the nozzle 40 is inserted into ~he lu~ricant cavity until the shoulder 49 engages the outer edge of the track pin 10, the stepped portion 45 is adjacent one of the cross-drilled holes 13 in the trac~ pin. As lubricant is introduc~
through the bore 46 into communication with the step pox~ion 45 it 11)~0356 passes through the cross-drilled hole 13 into the in~ernal space l~
between the trac~ pin and bushing. The lubricant passes the length of the bushing until it re-enters the lubricant cavity through the other cross-drilled hole in the track pin. When the lubricant S cavity 12 of the track pin is filled, lubricant then passes throug~
a second bore 48 extending axially from the inner end of the insert portion 42 until it passes out through the exhaust port 41 to in-dicate that the entire chamber 12 has been filled.
When the chamber 12 has been filled, the lubrication ~ no2zle 40 is withdrawn from the trac~ pin cavity and plug 23 which had previously been removed by being driven through the track pin bore ls reinserted into the open end of the track pin to seal the ~o~ lubrication cavity.
Withdrawal of the nozzle from the cavity and insertion of the plug 23 provide a slight positive pressure within the trac~
pin cavity due to a slight difference in spacing, insufficient to expel plug 22 from the opposite end, but sufficient to insure proper flow of lubricant into the space 18 between the pin and bushing.
~ While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substitu~ed for elements thereof without departing from the scope o~ the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the in~ention without departing from the essential scope thereof.
Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claim~.
~0603S6 the track link hinge joint by such means as improYed mettallurgy and herme~ic sealing and lubricating the joints. ~owever, pro-duction costs of such systems have been such that these solutions are not commercially satisfactory. Seals have been developed which protect, with varying degrees of e~Pecti~eness, against the entry of abrasives into the track link hinge joint and retain lubricant within the joint to minimize abrasion between the track pin and the track link bushing~ Bores in the track pin have been used for retaining and storing lubricant, but precision machining costs and in-the-field machine downtime, which has been heretofor requàred or replenishing the lubricant within the track pin, r~ have rendered such systems unsatisfactory. Threaded and pressed-in steel plugs hava been used but the material cost, and time and trouble in removing worn and corroded plugs when servicing t~.e track links in the field, are both prohibitive and impractical.
Other types of plug systems have also been u~ilized, but require the replacement of a component of the seal assembly when reple-nishing the lubrican~. Such systems axe undesirable since they require maintaining a supply of replacement parts for field ser~icing.
Other problems are created when using a bore formed in the track pin to retain lubricant. Air trapped within the track pin cavity is compxessed by tha addition of lubricant so that th~
in~ernal pxessuxe within the cavity increases expelling lubricant from the track pin cavity upon the removal of the lubricant nozzle. Since the lubricant cavity is not vented to atmosphere when lubricant is added, many times an inadequate supply of lub ricant results.
SUMMAR~ OF TH~ INVENTION
It is, therefore, an object of this invention to improv~
track link hinge joint lubxication systems.
Another object of this invention is to main~ain a reple~-)3S6 ishable supply of lubricant in the track link joints without requiring the replacement of seals or lubrication plugs.
A further object of this invention is to minimize machine downtime required for field lubrication of track link joints.
Still another object of this invention is to uniformly fill the lubricant xetaining cavity of the track pin.
These and other objects are attained in accordance with the present invention wherein there is provided a sealed track pin and track link bushing lubrication system wherein lubricant is carried within the track pin and is readily replenished in the field without requiring a replacement seal.
In accordance with a further broad aspect of the present invention, there is provided a method of relubricating a track link hinge joint formed by adjacent track links connected for pivotal interaction by means of a track pin carried by one link extending co-axially through a bushing carried by an adjacent track link, wherein the track pin has a lubricant retaining bore extending axially therethrough with passages extending from the bore to the outer surface of the track pin adjacent the bushing for passing lubricant from the bore to lubricate the surface and seals positioned within each end of the bore for retaining lubricant therein. The method comprises passing a first seal positioned at one end of the bore through the bore into the position of a second seal at the opposite end thereof to expel the second seal from the bore so that the bore is open at one end. Lubricant i6 then inserted into the bore through the open end thereof. The open end of the bore is then sealed to retain the lubricant therein.
~06~356 DESCRIPTION O~ THE DRAWINGS
Further objects of the invention, together with addition~
al features contributing thereto and advantages accruing therefrom will be apparent from the following description of one embodiment of the invention when read in conjunction with the accompanying drawings, wherein: Fig. 1 is a cross-sectional view of a track link hLnge joint taken along the axis of the track pin showing the track link joint in a serviced condition, Fig. 2 is a cross-sec~ional view of a track link hinge joint taken along the axis o~ the track pin showing the track link hinge joint during field servicing in preparation for new lubricant to be added to the track pin cavity; and Fig. 3 is a cross-sectional view of a track link hinge joint taken along the axis of the track pin showing a lubrication nozzle and the manner in which the lubricant within the track pin is replenished during servicing.
DESCRIPTION OF A PREFERRED EMBODIMENT
Referring now to Fig. 1 there is shown a track link hinge joint 20 formed by a track pin 10 articulately coupling spaced trac~ links 15 which carry ground engaging track shoes ~O ~not shown) to form an endless track for supporting a vehicle.
- 4a -iO356 ¦ The track pin 10 couples adjacent track links, one to ~he other, and permits relative pivotal movement between the links through the coupling of ~rack link bushings 16, fixedly secured a~ one end of each track link, to the adjacent track link through track pin 10 fixedly secured in complementary end portions 11 o~ the adjacent link. Since relative movement be~ween the track lin~
bushing 16 and the track pin 10 is necessary for operation of the txack laying vehicle, suitable lubricant must be provided in a space 18 deined by the outer surface of the track pin 10 and ~he inner surface of the track link bushing 16 to prevent metal-to-m~tal contact for minimizing wear and frictional losses as well as reducing the noise level of the machine operation.
" The track pin 10 has a rifle drilled hole or bore 12 traversing the length of the pin at the approximate center line 1~ or axis to form a lubricant retaining cavity. A pair of cross-drilled holes 13, foxmed in the wall o~ the tracX pin, allowcommunication between the bore 12 in the center of the pin and the outer surface thereof at a poin~ adjacent to the inner surface of the track link bushing 16. When lubricant is added to the lubricant cavity 12 of the track pin, the lubricant will move outwardly through the cross-drilled linking holes 13 into the space 18 formed between the outer surface of the track pin 10 and the inner surace of the track link bushing 16 providing a film of lubricant to prevent metal-to-metal contact between the pin 2S and bushing. A pair of seals 19 are positioned adjacent the outer end of the track link bushing 16 to provide a lubricant proof seal between the track pin and the track link bushing. The seals 18 maintain the lubrican~ between the outer surface of the track pin and the adjacent inner surface of the track link bushing and prevent abrasive materials from entering between these surfaces.
A pair of resilient elastomeric plugs 22 and 23, which are of a material not deleteriously affected by ~he lubricant, axe secured in both ends of the track pin 10 to seal ~he lubrican~ containing cavity 12.
After a period of operation, it becomes desirable or necessary to replenish or replace the lubricant retained within the track pin cavity 12. Referring to Fig. 2, access to the lubricant cavity 12, to replenish or replace the lubricant, is accomplished by a plug driving tool 30 formed as a cylindrical rod 31 o a diameter slightly less than that of the internal bore and ex~ending a length equal to that of the ~rack pin less the length of one of the equal size plugs 22 or 23. A roll pin or suitable stop 32 is secured in the plug driving tool to insure ~hat the tool, when inserted in the track pin 10, extends only this predetermined length for a purpose to be hereinafter describe~
in detail.
Replenishment of the lubricant within the track pin lubricant cavity 12 is accomplished by utilizing the plug driving tool 30 to drive one of the plugs 22 or 23 through the internal bore or lubricant cavity in the track pin 10 into the position previously occupied by the plug at the opposite end of the bore 12 ~ tqhile repacking can be effected from either side of ~he track pin 10, in Fig. 2 the plug driving tool 30 has been inserted from the le~ end and has driven plug 22 from the left to the right side into the position of and replacing plug 23. Plug 23 is removed by ~his action and can be reinserted from the left end in the ~5 position o and replacing plug 22 to again close the lubricant cavity 12 after repacking. The roll pin or stop 32 for the plug dri~ing tool 30 is positioned to insure that the length of the driving tool inserted into the track pin 10 will position plug 22 in the same position as formerly occupied by plug 23. The bore 1 of track pin is then ready for replacement of the lubricant.
New lubricant is added to the lubricant chamber 12 by means o~ a lubricant nozzle-40 which is inserted into the track 1C~6V3S6 pin lubrication caYity through the open end. The lubrication nozzle is inserted into the open end of the ca~ity 12 and lubrica~t added until such time as the lubricant begins to pass from an overflow port 41 in the lubricant nozzle indicating that the internal chamber 12 has been ~illed. The lubricant nozzle 40 is then removed from the lubricant cavity 12 and plug 23 inserted to reseal the cavity.
Since the lubrication nozzle is vented to the atmospher~
remov~l o~ ~he nozzle ~rom the cavity will not cause the lubricant to be blown rom the cavit~ due to internal pressure within the track pin bore 12. Internal pre~sure wi~hin the track pin cavity 12 can also create a plug of lubricant which would appear to in-dicate that the track pin cavity 12 is full when in fact the cavit~
is empty except for the plug o lubricant so formed. The track pin lubrication ~ozzle 40 prevents such pressure build-up by vent-àng the chamber 12 to atmosphere.
The lubrication nozzle 40 is formed with a stepped or insert portion 42 of a diameter slightly less than the internal bore o~ the lubricant chamber 12 and extending a length determined by a shoulder 49 formed on the nozzle. The insert portion 42 includes a pair of spaced lands 43 each carrying "O" rings or o~her suitable seal 44 for forming a lubricant tight sealing re-lationship between the internal surfaces of the lubricant chamber 21 and the seal rings 44. A stepped portion 45 formed by the two lands is in communication with a longitudinally extending bore 46, an outer portion o~ which (47) is adapted ~or coupling to a suit-able lubricant supply, not shown.
As shown in Fig. 3, when the nozzle 40 is inserted into ~he lu~ricant cavity until the shoulder 49 engages the outer edge of the track pin 10, the stepped portion 45 is adjacent one of the cross-drilled holes 13 in the trac~ pin. As lubricant is introduc~
through the bore 46 into communication with the step pox~ion 45 it 11)~0356 passes through the cross-drilled hole 13 into the in~ernal space l~
between the trac~ pin and bushing. The lubricant passes the length of the bushing until it re-enters the lubricant cavity through the other cross-drilled hole in the track pin. When the lubricant S cavity 12 of the track pin is filled, lubricant then passes throug~
a second bore 48 extending axially from the inner end of the insert portion 42 until it passes out through the exhaust port 41 to in-dicate that the entire chamber 12 has been filled.
When the chamber 12 has been filled, the lubrication ~ no2zle 40 is withdrawn from the trac~ pin cavity and plug 23 which had previously been removed by being driven through the track pin bore ls reinserted into the open end of the track pin to seal the ~o~ lubrication cavity.
Withdrawal of the nozzle from the cavity and insertion of the plug 23 provide a slight positive pressure within the trac~
pin cavity due to a slight difference in spacing, insufficient to expel plug 22 from the opposite end, but sufficient to insure proper flow of lubricant into the space 18 between the pin and bushing.
~ While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substitu~ed for elements thereof without departing from the scope o~ the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the in~ention without departing from the essential scope thereof.
Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claim~.
Claims (5)
1. A method of relubricating a track link hinge joint formed by adjacent track links connected for pivotal interaction by means of a track pin carried by one link extending co-axially through a bushing carried by an adjacent track link, wherein the track pin has a lubricant retaining bore extending axially there-through with passages extending from said bore to the outer sur-face of the track pin adjacent said bushing for passing lubricant from the bore to lubricate said surface and seals positioned within each end of the bore for retaining lubricant therein, the steps comprising passing a first seal positioned at one end of the bore through said bore into the position of a second seal at the opposite end thereof expelling said second seal from the bore so that the bore is open at one end, inserting lubricant into the bore through the open end thereof, and sealing the open end of the bore to retain the lubricant therein.
2. The method of claim 1 wherein the step of sealing the open end of the bore comprises placing the expelled plug in the open end thereof to close the bore.
3. The method of claim 1 wherein the step of inserting lubricant into the bore comprises passing lubricant from the bore through a passage extending from the bore to the outer surface of the track pin adjacent to the bushing, and passing lubricant over the surface of the track pin adjacent the bushing and through a passage extending from the outer surface of the track pin into the bore.
4. A lubrication nozzle for adding lubricant into a cavity closed by insertion of the nozzle thereinto comprising a nozzle adapted to be coupled to a source of lubricant and having a cavity insert portion of a predetermined length and stop means to define the length of said portion inserted into the cavity, passage means formed in said nozzle for communi-cating a source of lubricant with the interior of said cavity through an injection opening, seal means carried by said cavity insert portion adjacent said injection opening to form a lubricant tight seal upon the insertion of the nozzle into the cavity, and discharge means formed in said nozzle for communi-cating with the interior of the cavity through said nozzle for discharging excess lubricant injected into the cavity.
5. The apparatus of claim 4 wherein said seal means carried by said insert portion are positioned about said injection opening to form a lubricant tight seal with the interior of said cavity upon the insertion of the nozzle thereinto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA311,695A CA1060356A (en) | 1975-12-12 | 1978-09-20 | Method of relubricating a track link hinge joint |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/640,255 US4042065A (en) | 1975-12-12 | 1975-12-12 | Track link hinge joint lubricating system |
| CA266,081A CA1056741A (en) | 1975-12-12 | 1976-11-19 | Track link hinge joint lubricating system |
| CA311,695A CA1060356A (en) | 1975-12-12 | 1978-09-20 | Method of relubricating a track link hinge joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1060356A true CA1060356A (en) | 1979-08-14 |
Family
ID=27164781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA311,695A Expired CA1060356A (en) | 1975-12-12 | 1978-09-20 | Method of relubricating a track link hinge joint |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1060356A (en) |
-
1978
- 1978-09-20 CA CA311,695A patent/CA1060356A/en not_active Expired
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