PIN AS 9C6187 - Caterpillar

Truck Engines:
3126E (S/N: G3E1-UP; CKM1-UP; CRP1-UP; 9SZ1-UP)
Engine:
3126 (S/N: 1WM1-UP; 4ES1-UP; 1BW1-UP; 8HW1-UP; 7LZ1-UP)
3126B (S/N: BKD1-UP; 1AJ1-UP; 8YL1-UP; 6PZ1-UP; 7JZ1-UP; 8SZ1-UP)
Truck Engines:
3126E (S/N: LEF1-UP)
Truck Engine News SEBD6710, 01 April 1999, "Hydraulic Electronic Unit Injector HEUI Pump Service Tips". Disregard this article. Refer to the article that follows.Use care when servicing HEUI pumps in Table 1. When the fuel line fittings and the fittings for the oil line are assembled to the pump, an excessive torque that is applied to the fittings can damage the threads of the pump ports. If the pump requires service, refer to Illustrations 1 and 2.When you service the pump drive gear, inspect the pump drive gear. If the pump drive gear is loose or the pump drive gear is damaged, the pump should be replaced and the engine oil filter should be changed.Plug (2) and plug (18) are the only plugs that are serviceable. The other plugs of the pump group are not serviceable. Check the other plugs of the pump group for leaks. Replace the pump if any of the other plugs on the pump group are leaking. Inspect the O-ring seal. If the O-ring seal is worn or if the O-ring seal is damaged, replace the O-ring seal.
Table 1
Unit Injector Pump     Base Pump Group     Reman    
107-1228     109-4327     0R-4969    
134-0467     135-5459     0R-9439    134-0467 Unit Injector Hydraulic Pump Gp
Illustration 1 g01254703
(1) Tighten the bolt to the following torque. ... 108.8 13.6 N m (80 10 lb ft) (2) Tighten the plug to the following torque. ... 6.0 0.7 N m (53 6 lb in) (3) Injection actuation pressure control valve (IAPCV) (4) Tighten the bolt to the following torque. ... 24.5 2.5 N m (18 2 lb ft) (5) Tighten the valve to the following torque. ... 50 5 N m (37 4 lb ft)Note: Lubricate the seals prior to assembly. The coil and the valve assembly must be assembled as a matched set. (6) Tighten the inlet of the