Giant P450-5100, Инструкция по эксплуатации / Руководство по ремонту и обслуживанию

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8
Gear End
If oil leaks where the plunger (16) extends from the crankcase (1), the oil seals (19) and plungers (16) must be examined
and replaced if necessary. Remove oil plug (5) and drain oil; remove crankcase cover (3). Remove valve casing (26), and
seal case (20). Then remove plunger pipes (16B) and oil scrapers (16H) as described above.
IMPORTANT
Before removing conn-rods be aware of their position on the crankshaft so as to return them to the same
location when re-assembling.
Remove screws from connecting rods (15), separate the back conn-rod half from the crankshaft and the front conn-rod half.
The conn-rod halves must be kept as pairs - do not mix them up. Push conn-rod shaft as far as possible into the crosshead
guide. Remove screws (10) and pry bearing covers (7,8) off gently with a screwdriver.
Carefully remove crankshaft (13) by threading it through the conn-rods (15), making sure not to bend the conn-rods. Remove
and disassemble conn-rods and plungers (16) paying close attention not to damage the plungers. Pry out oil seal (19) using
a screwdriver. Examine plunger surfaces (16A) and replace if necessary.
To re-assemble, first press the oil seal (19) into the crankcase. Then insert conn-rods with plungers remembering their
original location. Thread in the crankshaft (13). Replace bearing cover (7) and o-ring (9) together with the radial shaft seal
(11) and roller bearing (12) and fix in place with screws (10). Replace roller bearing (12), bearing cover (8) and o-ring (9).
Adjust the clearance by fitting shims (8A) under the bearing cover as required to ensure that the crankshaft (13) turns easily
without play being felt. Finally, mount conn-rod halves on crankshaft matching them with other half and tighten screws (15)
to 97 lb-in (11 Nm). Replace crankcase cover (3) and o-ring (4). When remounting the valve casing (26), tighten hexagon
socket screws (34) to 29.5 lb-ft (40 Nm).
To Move Crankshaft to Opposite Side
Remove the valve casing (26) and seal case (20). Then rotate the crankcase 180°. Interchange the oil plug ((5B) with oil
dipstick (2). Rotate the crankcase cover (3) 180°. Remount the valve casing together with the seal casing and the seal
adapters (20). Make sure that the seal adapters are rotated in order that the bores face downwards.