793D Off-Highway Truck Power Train: Pump Drive

(1) Pump drive(2) Pump drive shaft which is located under the guard

(3) Yoke assembly (4) Housing (5) Bearings (6) Shims (7) Drive gear (8) Cage (9) Idler gear (10) Shaft (11) Shims (12) Cage (13) Shims (14) Bearings (15) Driven gear(16) Bearings

(1) Pump drive (3) Yoke assembly (17) Steering piston pump (18) Piston pump for fan drive(19) Gear pump for the hoist and brake retract

Pump drive (1) is fastened to the inner right side of the main frame directly behind the flywheel housing of the engine. The accessory drive gear in the flywheel housing drives pump drive shaft (2). Pump drive shaft (2) is connected to yoke assembly (3) .

Splines connect yoke assembly (3) to drive gear (7). Drive gear (7) turns idler gear (9) which turns driven gear (15) .

Shims (6) are used to adjust the end play of drive gear (7). Shims (11) are used to adjust the end play of idler gear (9). Shims (13) are used to adjust the end play of driven gear (15) .

Three pumps are driven by the pump drive. Steering piston pump (17) is fastened to cage (8). The pump is driven by drive gear (7). The gear pump for the hoist and brake retract (19) is fastened to cage (12). The piston pump for the fan drive (18) is fastened directly to housing (4). The piston pump for the fan drive (18) is located across from the gear pump for the hoist and brake retract (19). Driven gear (15) drives both the piston pump for fan drive (18) and the gear pump for the hoist and brake retract (19) .

Lubrication of the pump drive is provided by oil from the torque converter charge pump section. The oil is sprayed on drive gear (6). Holes in housing (4) will send oil to each bearing. An oil level is kept in housing (4) so that the teeth on driven gear (15) are in oil. The gears will throw oil in the housing. Extra oil in housing (4) goes to the torque converter housing.

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793D Off-Highway Truck Power Train: Pump Drive 2013-01-06T19:58:00-08:00 Rating: 4.5 Diposkan Oleh: Unknown