SPACER 2M1474 - Caterpillar

Illustration 1 g06237766
View showing broken roller
This procedure is adaptable to the machines within the listed serial numbers, and is effective with all machines after the listed serial numbers.Parts Required
Illustration 2 g06273134
Table 1
Parts Required
Item Qty New Part Number Part Name Former Part Number
1 2 8Y-3795 Bosses
2 2 523-4605 Rollers 6T-3852 Tooling Required
The following tooling is required for use to correctly relocate the transmission slide rails.
Illustration 3 g06272662
Table 2
Tooling Required
Item Tool Number Description
3 FT3541 Weld Fixture As Assess the Position of the Rails and Condition of the Rollers
Remove the transmission from the machine.Refer to Disassembly and Assembly , M0073303 , "D6T Track Type Tractor Power Train" , Transmission - Remove and Install or Disassembly and Assembly , M0076745 , "D8R and D8T Track-Type Tractor Power Train" , Transmission - Remove and Install.
Illustration 4 g06237953
View showing location of bosses
Looking from the rear of the machine, identify the rails which are slip-fitted over the pair of bosses welded to the front of the case.Rework Procedure
Do not operate or work on this machine unless you have read and understand the instructions and warnings in the Operation and Maintenance Manuals. Failure to follow the instructions or heed the warnings could result in injury or death. Contact your Cat dealer for replacement manuals. Proper care is your responsibility.
Illustration 5 g06237960
View showing position of rails
(A) Left rail
(B) Right rail
Remove left rail (A) and right rail (B).
Using a hand grinder, cut off both bosses.
Illustration 6 g06273195
View showing FT3541 installed with bosses in position
(1) 8Y-3795 Bosses
(3) FT3541 Weld Fixture As
Install FT3541 Weld Fixture As (3) to locate correct boss position.
Weld new bosses (1) in the correct location.Note: Take care to clean all weld chips, spatter, grinder dust, and any other debris from the case. Cleanliness in this area is critical to successful transmission operation.
Install the rails.
Install new steel 523-4605 Rollers (2) to replace the current steel or non-metallic 6T-3852 Rollers.
Install the transmission, using new seals.Refer to Disassembly and Assembly , M0073303 , "D6T Track Type Tractor Power Train" , Transmission - Remove and Install or Disassembly and Assembly , M0076745 , "D8R and D8T Track-Type Tractor Power Train" , Transmission - Remove and Install.If the final drives are removed, look inside the case and make sure that the rollers are not resting tight on the rail and not hitting the front of the case with the transmission correctly torqued in position.On a D8 only, if the roller is hitting the front of the case, you may need to remove the transmission and grind some material from the case where the roller is contacting. This possibility is slight, but should be checked.