FLYWHEEL 1W4939 - Caterpillar

1. Remove the oil pump mounting bolts (2) and locks.2. Remove the oil pump (1). Weight 55 lbs. (25 kg).Install Oil Pump
1. Put the oil pump on the engine.2. Install the oil pump mounting bolts and locks.end by: a) install oil panb) install engineDisassemble Oil Pump
start by: a) remove oil pump 1. Remove the cotter pin and loosen gear retaining nut (2). Using tool setup (A), remove the oil pump drive gear (3) from shaft. Remove tool setup (A), nut, washer and gear. Remove the woodruff key from shaft.2. Remove the suction bell (1). Remove the oil pump bypass valve cover and spacer.
Loosen the cover mounting bolts slowly until spring tension is relieved.
3. Remove the bypass valve spring and plunger. 4. Remove the pump housing mounting bolts and separate housings (4) and (7). Remove two oil pump gears (6) and woodruff key from the oil pump shafts. Remove spacer plate (9), shaft (8) and gear (5).Assemble Oil Pump
1. Put SAE 30 engine oil on the shafts and gears. Install the oil pump shaft and gear. Install the spacer plate. 2. Install the woodruff key in the shaft and place both gears on the shafts. Connect housings (1) and (2). Install the pump housing bolts. The oil pump gears must turn freely after the housing bolts have been tightened.3. Put lubricant on bypass valve plunger (3), spring (5), spacer (6) and cover (7). Install the suction bell assembly (4). 4. Install the woodruff key and oil pump drive gear (8). Install the gear retaining nut (9). Tighten the retaining nut to 100 lb.ft. (13,8 mkg) plus amount needed to install cotter pin.end by: a) install oil pump