SkyTrak 6036 Service Manual - Manual (Page 103)

Section 8A Perkins Engine
Model 6036/6036T S/N 9B0500 thru 14833 8A-11
FAN PULLEY
ALTERNATOR
PULLEY
1/4" TO 3/8"
(6 TO 9 MM) BELT
DEFLECTION
CRANKSHAFT PULLEY
OA0362
Fig. 8A.21 Fan Belt Tension
8A.8.5 Inspect Fan Hub
Inspect the hub as follows:
1. Remove fan belt.
2. Check the fan hub bearing; the hub should
spin freely without any wobble or excessive
end play. Maximum end play is 0.006”
(0,15 mm).
3. Install the fan belt.
8A.8.3 Check Valve Stem
to Rocker Arm Gap
Check and set valves with the engine cold—below
140 °F (60 °C). The correct gap between the top
of the valve stem and the rocker lever is 0.012"
(0,30 mm) with the engine cold.
NOTE: No. 1 cylinder is at the front of the engine.
To set these gaps:
1. Turn the crankshaft in the normal direction of
rotation until the inlet valve of No. 4 cylinder
has just opened and the exhaust valve of the
same cylinder has not fully closed. Check the
clearances of the No. 1 cylinder valves and
adjust if necessary, Fig. 8A.20.
2. Turn the crankshaft in the normal direction of
rotation until the inlet valve of No. 2 cylinder
has just opened and the exhaust valve of the
same cylinder has not fully closed. Check the
clearances of the No. 3 cylinder valves and
adjust if necessary.
3. Turn the crankshaft in the normal direction of
rotation until the inlet valve of No. 1 cylinder
has just opened and the exhaust valve of the
same cylinder has not fully closed. Check the
clearances of the No. 4 cylinder valves and
adjust if necessary.
4. Turn the crankshaft in the normal direction of
rotation until the inlet valve of No. 3 cylinder
has just opened and the exhaust valve of the
same cylinder has not fully closed. Check the
clearances of the No. 2 cylinder valves and
adjust if necessary.
MA1451
Fig. 8A.20 Checking Gap Between Valve Stem Tip
and Rocker Arm Lever
8A.9 ENGINE MAINTENANCE
Every 2,500 Hours
or 2 Years
All checks or inspections listed under daily or
previous maintenance intervals must also be
performed at this time in addition to those listed
under this maintenance interval.
1. Inspect and service proprietary equipment
such as starter motor, alternator, turbocharger
(if applicable) etc.
2. Service fuel injectors, paragraph 8A.13.8.
3. Check and adjust valve stem tip to rocker arm
gap clearances, paragraph 8A.8.3.
4. Visually inspect vibration dampers on motor
mounts.
8A.8.4 Check Fan Belt Tension
1. Maximum fan belt deflection at the longest
span of the belt should be 1/4 to 3/8” (6 to 9
mm) with an applied force of 13 to 15 lbs.
(6 to 7 kg) Fig. 8A.21.