Komatsu PC20R-8 Shop Manual page 196

REMOVAL AND INSTALLATION
REMOVAL OF THE CYLINDER HEAD
Disconnect the negative terminal cable (±) from the
battery.
H Drain the engine coolant.
Coolant: Approx. 4
1 - Remove the water coolant pump. (For details, see
«REMOVAL OF WATER COOLANT PUMP»).
2 - Remove filter (1) and bracket (2).
3 - Loosen clips (3) and disconnect exhaust pipe from
muffler (4) .
Disconnect pre-heating cable (5).
4 - Loosen the screws (6) from support (7) and nuts (8)
from muffler.
Remove muffler (4).
5 - Remove the fuel filter (9) without disconnecting the
tubes. Put it to rear side of machine.
6 - Remove nozzle holder (10). (For details, see «RE-
MOVAL OF THE NOZZLE HOLDER»).
7 - Remove the valves cover (11).
8 - Remove the rocker-arm shaft (12).
H Loosen the lock nuts and unscrew the valve tap-
pets by 2-3 turns.
9 - Take out the rocker-arm control rods (13).
30-14
,
2
3
4
5
10
9
13
CYLINDER HEAD
1
RKPA2620
8
7
6
RKPA2670
11
RKPA2631
12
RKP06400
PC20R-8 PC27R-8