Torque Specifications; Pump Mounting Selection Guide - Giant LP121A Operating Instructions Manual

LP121A, LP200, LP250, and LP250W-MT - Repair Instructions
To Dismantle Gear End
After removing valve casing (43) and plunger pipe (29B), drain oil. Remove crankcase cover (4)
and bearing cover (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 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. (35 NM).
LP121A, LP200, LP250, and LP250W-MT Torque Specifications
Position Item#
24 13340
29C 13031
48 06077
49A 07158
Bushings
06496 - 35mm 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")
Description
Inner Hex Screw, Connecting Rod 310 in.-lbs. (35 NM)
Tension Screw, Plunger
Plug, Discharge
Hexagon Nut, Stud Bolts

Pump Mounting Selection Guide

9
Torque Amount
310 in.-lbs. (35 NM)
107 ft.-lbs. (145 NM)
59 ft.-lbs. (80 NM)