GP7155-5100 REPAIR INSTRUCTIONS

To Check Valve Assemblies

1.Loosen plugs (58), take out tension spring (57) and then remove the complete valve assembly (51) with either a valve tool or an M16 hexagon screw.

 

 

57

 

 

51C

 

 

 

 

58

56 51E

51A

57

51

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

51D

2.Remove valve adapter (56) and tension spring (57) with pull-out tool size 5. There is an O-ring (51G) under both the suction and the discharge valve each of which can be removed with a bent piece of wire.To disassemble unscrew the spring tension cap (51A) and press the valve seat (A) out of the spacer pipe (E). Check sealing surfaces and replace worn parts. Check O- rings and support rings. Reinstall all parts in reverse order and tighten plugs (58) to 107 ft. lbs.

To Check Seals & Plungers. 3.Loosen nuts (49A) and remove pump head. CAUTION: Don't loosen the 3 plunger connections (36A) before the valve casing has been removed otherwise the tension screw (36C) could hit against the spacer pipe (51E) when the pump is being turned. Seal life can be increased if the pretensioning allows for a little leakage. This assists lubrication and keeps the seals cool. It is therefore not necessary to replace seals before the leakage becomes too heavy and causes output and operating pressure to drop.

4.Separate plunger connection (36A) from crosshead (25) by means of two open-end wrenches (size 22 and 27). Pull seal sleeves (39) out of their fittings in the crankcase.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

36B

39A

39

43

42

42

41

38

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5.Take seal case (38) out of seal sleeve (39). Examine plunger parts (36A-36D), seals (42,39A) and O-rings.

When replacing plunger pipe (36B), tighten tension screws (36C) to 30 ft. lbs.

Replace worn parts; grease seals with silicone before installing

TO DISASSEMBLE GEAR

Take out plunger and seal sleeves as described above. Drain oil. After removing the circleclip 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.

Note: 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 connecing rod and crankshaft (22) take out bearing cover to one side and push out crankshaft taking particular care that the conrod doesn't gt bent.

Note: Seal (32A) must always be installed so taht the seat up on the inside diameter faces the oil.

Reassemble in reverse order: Regulate axial bearing clearance minimum 0.1mm, maximum 0.15-by means of fitting disc (20A) shaft should yturn easily with little clearance. Tighten inner hexagon screws to 30 ft. lbs.

Note: Connecting rod has to be able to be slighty moved sidewise at the stroke journals.

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Giant installation instructions GP7155-5100 Repair Instructions, To Disassemble Gear
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GP7155-5100 specifications

The Giant GP7155-5100 is a prominent model within the realm of electric bicycles, manufactured by the esteemed Giant brand, which is known for its commitment to quality and innovation. The GP7155-5100 is designed to cater to both avid cyclists and casual riders, combining versatility, performance, and advanced technology to create an exceptional riding experience.

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Overall, the Giant GP7155-5100 is a versatile electric bicycle that combines robust engineering, cutting-edge technology, and user-friendly features, making it an excellent choice for anyone looking to enhance their cycling adventures. Whether for daily commuting or weekend excursions, it promises an enjoyable and efficient ride.
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