ALTERNATOR AS-CHARGING 7W8168 - Caterpillar

Illustration 1 g03324616
Pump regulator (drive pump)
(1) Bolt
(2) Cover
(3) Seal
(4) Spring seat
(5) Spring
(6) Shim Perform the following steps in order to adjust the drive pump.
Remove two bolts (1).
Remove cover (2) and seal (3).
Remove spring seat (4) and spring (5).
Add shims (6) in order to increase the negative flow. Remove shims (6) in order to decrease the negative flow. Refer to Table 1 for available shims and shim thickness. Note: A change of 0.1 mm (0.0039 inch) in shim thickness will change the negative flow rate 2 L/min (0.5 US gpm) at a negative flow control pressure of 2300 kPa (333 psi).
Table 1
Available Shims
Part Number Shim Thickness
099-3669 Shim 1.00 mm (0.0394 inch)
099-6109 Shim 1.05 mm (0.0413 inch)
099-6110 Shim 1.10 mm (0.0433 inch)
099-6111 Shim 1.15 mm (0.0453 inch)
099-6112 Shim 1.20 mm (0.0472 inch)
099-6113 Shim 1.25 mm (0.0492 inch)
099-6115 Shim 1.30 mm (0.0512 inch)
Install shims (6) in the pump regulator.
Install spring (5). Install spring seat (4).
Install cover (2) and seal (3). Note: Inspect seal (3). If the seal is damaged, replace the damaged seal with a new seal.
Install bolts (1). Tighten bolts (1) to a torque of 55 10 N m (40 7 lb ft). Adjust the idler pump in the same manner as the drive pump.