ELBOW 4N5715 - Caterpillar

Delphi Fuel Injection Pump (DPA or DPS)
Illustration 5 g00788005Note: Parts that are inside of the fuel injection pump are only serviceable by an authorized Delphi dealer. Please consult your parts book for availability of parts on the outside of the pump that are not related to the settings of the fuel pump and for the possibility of remanufacturing options. (1) Hub nut Note: Do not release the hub nut from the fuel injection pump. The fuel pump hub is positioned to the pump shaft in order to ensure that the fuel pump is in the correct position for timing. If the hub is removed, the hub will need to be accurately positioned to the pump shaft. Accurate positioning requires the use of special equipment by a Caterpillar Dealer. (2) O-ring (3) Locking spacer The drive shaft of the fuel injection pump must not be turned without the spacer in position under the locking screw (4). (4) Tighten the locking screw to the following torque. ... 10 N m (7 lb ft)The locking screw prevents the rotation of the drive shaft.
Illustration 6 g00292837Before the crankshaft is turned or the fuel injection pump is installed, move the locking spacer (3) under the locking screw (4). Refer to position (A) that is in Illustration 6. This position ensures that the pump drive shaft is released. (5) Tighten the fitting for the fuel return line connection to the following torque. ... 5 to 6 N m (44 to 53 lb in) (6) Tighten the adjustment screw for low idle to the following torque. ... 4 to 4.5 N m (35 to 40 lb in) (7) Tighten the adjustment screw for high idle to the following torque. ... 4 to 4.5 N m (35 to 40 lb in) (8) Electrical connection for the stop solenoid (9) Tighten the fitting for the fuel supply connection to the following torque. ... 22 N m (16 lb ft) (10) Tighten the nuts for the fuel line to the following torque. ... 22 N m (16 lb ft) (11) Tighten the flange nuts to the following torque. ... 22 N m (16 lb ft) (12) Electrical connection for cold starting aid (13) Tighten the fittings for the fuel discharge lines to the following torque. ... 70.5 to 81.4 N m (52 to 60 lb ft)Timing Information for the Delphi Fuel Injection Pump
Table 3
Delphi Fuel Injection Pump
Code that is on the Fuel Injection Pump Engine Check Angle (degrees) Fuel Injection Pump Mark Angle (degrees)
"AK" 325.5 336
"AM" 282 290.5
"BF" 326 334
"BM" 281 291
"CM" 282.5 291.5
"DM" 282.25 290.5
"FK" 325.5 336
"GK" 325 336
"GM" 282 290.5
"HK" 326 336
"HM" 282 291
"JK" 325 334
"KK" 325 334
"LK" 327 337.5
"LK"(1) 328 337.5
"MK" 326 336
"MK"(2) 325 336
"PK" 326 334
"RK" 328 336
"RM" 282.5 290.5
"TK" 327 334
"UK" 326 334
"XM" 282 291
(1) "YA31257" only
(2) "YA50532" only
Table 4
Dephi Fuel Injection Pump With Locking Screw
Code Letters on Fuel Injection Pump Locking Angle (degrees)
"BC" 336.5
"CC" 338.5
"DC" 337.5
"EC" 337.5
"FC" 335.5
"GC" 337
"PC" 339
"RC" 339
"SC" 341
"XL" 22 Note: Later Delphi Fuel Injection Pumps are timed with a pin.