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GP7124A REPAIR INSTRUCTIONS
MOUNTING VALVE CASING
Check O-rings (39A) and support rings (39B) on seal case (39). Clean surfaces of seal sleeves in gear box
and sealing surfaces of valve casing.
Push valve casing carefully onto O-rings of seal case and centering studs (50A). Tighten nuts (49A) to103
ft-lbs.
TO DISASSEMBLE GEAR
Take out plunger and seal sleeves as described above. Drain oil. After removing the circlip ring (33B), lever
out seal retainer (33) with a screw driver. Check seals (32,32A,33A) and surfaces of crosshead. Remove
crankcase cover (4). Loosen inner hexagon screws on the connecting rods (24) and push con rod halves as
far into the crosshead guide as possible.
CAUTION: Connecting rods are marked for identification. Do not twist con rod halves. Con Rod is to be
reinstalled in the same position on shaft journals.
Check surfaces of connecting rod and crankshaft (22)
Take out bearing cover to one side and push out crankshaft taking particular care that the con rod doesn't
get bent.
CAUTION: Seal (32A) must always be installed so that the seal-lip on the inside diameter faces the oil.
Reassemble in reverse order: Regulate axial bearing clearance - minimum 0.1mm, maximum
0.15mm-by means of fitting disc (20A). Shaft should turn easily with little clearance. Tighten
inner hexagon screws to 30 ft.-lbs.
CAUTION: Connecting rod has tobe able to be slightly moved sidewise at the stroke journals.
Position Item# Description Torque Amount
10 13133 Hexagon Screw 30 (ft.-lbs)
36 13138 Plunger 26 (ft.-lbs.)
49A 13160 Nut 103 (ft.-lbs)
GP7124A TORQUE SPECIFICATIONS