To Check The Valve Timing - Perkins 700 Series User Handbook Manual

Section 17
Engine Timing
Operation:
To check valve timing
Recommended torque:
Engine type Nm
-
Service operations:
1. Remove rocker cover ... ... ... ... 12.01
2. Set valve tip clearances ... ... ... 12.04
Check and, if necessary, adjust the valve tip
clearances.
Rotate the crankshaft, clockwise from the front,
until the valve is fully open. The piston for
number one cylinder is now on the compression
stroke.
Set the valve tip clearance for the valve to 0,59 mm (0.023 in).
Rotate the crankshaft, clockwise from the front,
until the push rod for the valve just tightens. In this
position, check if the mark on the crankshaft
pulley is within 2.5° of the mark on the timing case. If
it is, the valve timing is correct.
If the timing is more than 2.5° out of position, the
timing gears are probably not in correct mesh.
Note: Use the formula below to find the
measurement on the pulley which is equal to 2.5°.
C x P
360
Where:
- C = the circumference of pulley
- P = 2.5°
Rotate the crankshaft, clockwise from the front,
until the valve (7) has just opened and the valve (8)
has not closed completely. Set the valve tip clearance
of the valves (1 and 2) to 0,35 mm (0.014 in).
1
05/99
Printed in England
© Propriety information of Perkins Engines Company Limited, all rights reserved
Special notes:
lbf ft kgf m
2 3 4 5 6 7
700 Series
17.03
Timing mark
8
95