CONTROL GP-ENGINE ELECTRONIC 3712537 - Caterpillar

Torque Converter
PROBLEM: Torque converter overheating. PROBABLE CAUSE:1. Improper operation of machine. Constant overloading.2. Faulty temperature gauge.3. Cooling system of machine faulty.4. Mechanical failure of torque converter.5. Excessive oil build-up in the torque converter housing around converter due to excessive leakage through torque converter.6. Insufficient oil supply to the converter caused by: a. Excessive leakage in the transmission.b. Faulty pump.c. Clogged oil cooler or lines.7. Long periods of hydraulic retarder usage on machines so equipped.Differential And Bevel Gear
Differential (Earlier 627 Scrapers)
1. Assemble bevel pinion (4) so bearings (6) have zero end play. Then add shims (8) to provide .001 to .003 in. (0.03 to 0.08 mm) end play for bearings (6). Rotate pinion slowly while making adjustment.2. Place differential assembly with axle centerline in vertical position with adjusting ring (7) down.
DIFFERENTIAL AND BEVEL GEAR
1. Retainer. 2. Shims. 3. Bevel gear. 4. Bevel pinion. 5. Bearings. 6. Bearings. 7. Adjusting ring. 8. Shims.3. Using no shims (2), tighten the differential retainer (1) bolts evenly to 30 lb. ft. (4.1 mkg) torque and rotate the differential to seat the bearings.4. Loosen the retainer bolts to finger tight, again rotate the differential, then check bevel gear backlash. The correct backlash is .014 .005 in. (0.36 0.13 mm). If backlash adjustment is required, reverse the adjusting ring (7) lock so it holds only the bearing cage, then rotate the adjusting ring (7) as required. Reposition the lock and repeat Steps 3 and 4.5. Measure the clearance between the differential retainer (1) and the cover.6. Install shims (2) to provide .000 to .002 in. (0.0 to 0.05 mm) END PLAY for the differential bearings (5).Differential (Later 627 Scrapers and all 637 Scrapers)
1. Assemble bevel pinion (4) using shims (8) as necessary to provide an end play of .000 to .002 in. (0.0 to 0.05 mm) for bearings (6). Rotate pinion slowly while making adjustment.2. Install the differential assembly into the differential housing with adjusting ring (7) positioned to produce the approximate required backlash between bevel gear (3) and bevel pinion (4).
DIFFERENTIAL AND BEVEL GEAR
1. Retainer. 2. Shims. 3. Bevel gear. 4. Bevel pinion. 5. Bearings. 6. Bearings. 7. Adjusting ring. 8. Shims.3. Place the differential with axle centerline in vertical position with adjusting ring (7) facing down.4. Using no shims (2), install retainer (1) and tighten bolts evenly to 30 lb. ft. (4.1 mkg) torque while rotating differential assembly to seat bearings (5).5. Loosen the retainer bolts to finger tight, again rotate the differential assembly, then check bevel gear backlash. The correct backlash is .014 .005 in. (0.36 0.13 mm). If backlash adjustment is required, remove the lock and rotate the adjusting ring (7) as necessary. Then repeat Steps 4 and 5.6. Measure the clearance between the retainer (1) and the cover.7. Install shims (2) as necessary to provide .000 to .002 in. (0.0 to 0.05 mm) END PLAY for the differential bearings (5).Final Drive
Wheel Bearing Adjustment
Preferred Method
1. Install wheel complete with bearings.2. Install ring gear and hub assembly as