Giant GP7124A TORQUE SPECIFICATIONS, Mounting Valve Casing, To Disassemble Gear, Position

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.

GP7124A TORQUE SPECIFICATIONS

Position	Item#	Description	Torque Amount
10	13133	Hexagon Screw	30 (ft.-lbs)
36	13138	Plunger	26 (ft.-lbs.)
49A	13160	Nut	103 (ft.-lbs)

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