Giant LP301A-5100 installation instructions To Dismantle Gear END, To Reassemble

LP301A-5100 REPAIR INSTRUCTIONS

TO DISMANTLE GEAR END

After removing valve casing (43) and plunger pipe (29B), drain the oil. Remove the gear cover (4) and both bearing covers (14). Loosen connecting rod screws (24A) and push the front of the connecting rod (24) forward as far as possible into the crosshead guide.

IMPORTANT! Connecting rods (24) are marked for identification. Do not twist connecting rod halves. Connecting rod is to be reinstalled in the same position on shaft journals.

Turning the crankshaft (22) slightly, hit it out carefully to the side with a rubber hammer.

IMPORTANT! Do not bend the connecting rod (24) shanks. Check crankshaft (22) and connecting rod (24) surfaces, radial shaft seals (15) and taper roller bearings (20).

To remove the oil seals (31) use a wooden rod and sharply hit down on the oil seals from the crankcase (1). Note: when replacing the oil seals, apply a small amount of locktight to the outside edges of each oil seal before re-inserting them into the crankcase.

To Reassemble

Using a soft tool, press in the outer bearing ring until the outer edge lines up with the outer edge of the bearing hole. Remove bearing cover (14) together with radial shaft seal (15) and o-ring (16). Fit crankshaft (22) through bearing hole on the opposite side. Press in outer bearing and tighten it inwards with the bearing cover, keeping the crankshaft in vertical position and turning slowly so that the taper rollers of the bearings touch the edge of the outer bearing ring. Adjust axial bearing clearance to at least 0.1mm and maximum 0.15mm by placing fitting discs (20A and 20B) under the bearing cover.

IMPORTANT! After assembly has been completed, the crankshaft should turn easily with very little clearance. Tighten connecting rod screws (24A) to 310 in.-lbs. Re-assemble the fluid end (see instructions above).

LP301A-5100 TORQUE SPECIFICATIONS

Position	Item#	Description	Torque Amount
24A	13277	Inner Hex Screw, Connecting Rod	310 in.-lbs.
29C	07131-0100	Tension Screw, Plunger	265 in.-lbs.
48	06077-0100	Plug, Discharge	107 ft.-lbs.
49A	07158	Hexagon Nut, Stud Bolts	59 ft.-lbs.

Pump Mounting Selection Guide

Bushings

06496 - 35 mm H Bushing

Pulley & Sheaves

07165 - 12.75”Cast Iron - 4 gr. AB Section

Rails

07357 - Plated Steel Channel Rails

(L=11.75”x W=1.88”x H=3.00”)

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