Komatsu PC200-8M0, Shop Manual, Page: 987 / 1254

SEN06143-00
PC200, 200LC, 220, 220LC-8M0 50-200
25
200 Engine and cooling system
Removal and installation of cylinder head assembly
35. Remove fan belt (38) from alternator (39) as
follows. [*19]
q
Insert a wrench to the portion (A) (width
across flats
T
12.7 mm) of the tensioner
assembly (38a), and rotate it to the oppo-
site to the winding-up direction (R) to
decrease the fan belt (38) tension, then
remove.
k Make sure that the wrench is secured
at the portion (A) before rotating it.
(The spring of the tensioner assembly
(38a) is strong. If the wrench is loosely
inserted, the wrench may accidentally
come off while being rotated and it is
extremely dangerous.)
k After removing the fan belt (38), return
the tensioner assembly (38a) slowly
with care.
k Be careful not to get your fingers
caught between the pulley and fan belt
(38) during work.
36. Disconnect connectors AB (40) and E12 (41).
37. Remove alternator (39).
38. Remove clamp (43) and two bands (44) of wir-
ing harness (42).
39. Remove five head cover mounting bolts (45) to
remove head cover (46) together with blowby
duct (47).
a
After loosening head cover mounting bolts
(45), remove mud and foreign material
sticking around the head cover by blowing
air while holding the head cover with the
hand in order to prevent entry of mud and
foreign material.
a
When removing head cover (46), take
care not to hit it against the peripheral
parts.
40. Remove blowby duct (47) from head cover
(46). Remove fuel return tube (46a).
41. Remove fuel return tube (46a).
42. Remove twelve wiring harness nuts (49) from
six fuel injectors (48).
43. Remove the three connectors of engine wiring
harness (50). [*20]
a
Pull out each connector while pressing the
lock stopper. At this time, hold the gasket
with the hand to prevent it from moving.
44. Lift up and remove gasket assembly (51).
a
When removing the gasket, take care that
foreign material does not enter the engine.
a
When removing head cover (46), check
gasket assembly (51) visually. If gasket
assembly (51) is cracked, deteriorated, or
worn, replace it with a new one.