LINES GP-SWING MOTOR 1136825 - Caterpillar

Illustration 17 g00720454
Use the following adjustment procedure in order to check for ring gear runout.
Install Tool (H) on differential case assembly (8) in order to check for ring gear runout.
Position Tool (H) against the back of ring gear (15). Then zero Tool (H) .
Rotate the ring gear in order to obtain a value on Tool (H) .
Record the value that is indicated on Tool (H) from Step 14.c. This value is the ring gear runout.
The ring gear runout must not exceed the following specification:Ring Gear Runout ... 0.200 mm (0.008 inch)If the ring gear runout exceeds the specification, remove the differential assembly from the differential carrier assembly. Refer to Disassembly And Assembly, "Differential - Disassembly".
Inspect the components of the differential and inspect the differential carrier assembly for any problem that would cause the ring gear runout to exceed the specifications. Then repair the suspect components or replace the suspect components.
After the components have been repaired or the components have been replaced, install the differential into the differential carrier assembly. Then perform Steps 12 through 14.
Illustration 18 g00724594
Use the following adjustment procedure in order to adjust the ring gear backlash.If the former gear set is installed, adjust the backlash to the value that was recorded during disassembly of the Differential.If a new gear set is installed, adjust the backlash to the specification for a new gear set.
Refer to the following table for the specifications that are required.
Table 4
Specifications For The Ring Gear Backlash    
Ring Gear Diameter     Backlash Setting    
Range New Gears    
Less than
431.8 mm (17.0 inch)    
0.200 to 0.460 mm (0.008 to 0.018 inch)    
0.30 mm (0.012 inch)    
Greater than
431.8 mm (17.0 inch)    
0.250 to 0.510 mm (0.010 to 0.020 inch)    
0.380 mm (0.015 inch)    
Install Tool (H) on differential case assembly (8) in order to check for ring gear backlash.
Position Tool (H) so that the plunger is against the tooth surface of the ring gear (15). Then zero Tool (H) .
Hold the drive pinion in position. Rotate the ring gear against the drive pinion in order to obtain a value on Tool (H) .Note: Do not allow the pinion gear to rotate.
Record the value that is indicated on Tool (H) from Step 15.d. This value is the ring gear backlash.
Compare the measurement that was recorded in Step 15.e to the specifications that are listed in Table 4. If the measurement is not within the specifications, perform Step 16 and Step 17. If the measurement is within the specifications, then skip Steps 16 and 17.Note: Backlash is increased by moving the ring gear away from the drive pinion. Backlash is decreased by moving the ring gear toward the drive pinion.
One adjusting ring is loosened one full notch. The opposite adjusting ring is tightened one full notch.Note: When you adjust the backlash, move the ring gear ONLY. DO NOT move the drive pinion.
Repeat Steps 15.c through 16 until the backlash is within the specifications.
Check the tooth contact between the ring