Generac Power Systems 941-2 Manuale Utente
Section 2.2
VALVE TRAIN
VALVE TRAIN COMPONENTS
Valve train components are listed below and shown in
Figure 1, below.
Figure 1, below.
ITEM QTY DESCRIPTION
1
1
2
Tappet
2
2
Push Rod
3
2
Rocker Arm
4
2
Pivot Ball Stud
5
2
Rocker Arm Jam Nut
6
1
Push Rod Guide Plate
7
2
Valve Spring
8
2
Valve Spring Retainer
9
2
Valve Spring Washer
10
1
Exhaust Valve
11
1 Intake
Valve
Figure 1. Valve Train Components
VALVE COMPONENTS REMOVAL
1. The ROCKER ARM COVER is retained by four M6-1.00 x
12mm screws and lockwashers. Remove the four screws and
lockwashers, then remove the ROCKER ARM COVER and its
gasket.
lockwashers, then remove the ROCKER ARM COVER and its
gasket.
NOTE: Replace the ROCKER ARM COVER GAS-
KET each time the COVER is removed, to ensure
proper sealing.
KET each time the COVER is removed, to ensure
proper sealing.
Figure 2. Removal of Rocker Arm over
2. Loosen the rocker arm jam nuts on the pivot ball studs. Then,
loosen the pivot ball studs. Remove the two pivot ball studs,
the rocker arms and the jam nuts. Also remove the push rod
guide plate.
the rocker arms and the jam nuts. Also remove the push rod
guide plate.
NOTE: Keep the Intake valve and exhaust valve
parts separated. Intake and exhaust parts are
Identical. However, once a wear pattern has been
established on these parts their fit will be different.
parts separated. Intake and exhaust parts are
Identical. However, once a wear pattern has been
established on these parts their fit will be different.
Figure 3. Rocker Arm, Push Rod & Guide Plate
3. Remove the push rods. 4. Remove the cylinder head bolts,
then remove the cylinder head and head gasket.
NOTE: Replace the head gasket every time the
head is removed. The new head gasket must be
free of nicks and scratches as these could cause
leakage.
head is removed. The new head gasket must be
free of nicks and scratches as these could cause
leakage.
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