Perkins 4012TESI Series, Руководство пользователя, Страница: 35 / 57

MAINTENANCE PROCEDURES
4012/16 Gas, February 1998 31
FAN BEARINGS AND BELTS
Remove the mesh guard around the fan
belts, grease the fan and jockey pulley
bearings
Fig. 18 using high melting point
lithium based grease (e.g. Shell Alvania
R.A.)
Check the tension and condition of the fan
belts. Using a spring balance and rule, or a
belt tension indicator, check that the force
compares with the kgf (lbf) values shown
below for the correct belt deflection. See
Fig. 18 .
Fan belts if worn, should be replaced as a
complete, matching set. Individual belts
should NOT be replaced.
To adjust slacken the jockey pulley pivot and
adjuster bolts, and operate the jockey pulley
lever.
Moving the jockey pulley lever outwards will
tension the belts and inwards will slacken
the belts.
The correct tension is obtained by measur-
ing the deflection at the mid point between
the fan pulley and the crankshaft pulley
when the above force is applied.
To apply the force place a rule across the
outside width of the belts and attach spring
balance as shown
Fig. 18 pull on the spring
balance until the required force is reached
and measure the belt deflection.
Adjust the position of the jockey pulley lever
until the force on the spring balance and the
belt deflection agree with the figures given.
Key
(Fig. 18)
1. Force
2. Deflection
Deflection
11 mm
kg Force
3 - 4.3
lb Force
6,67 - 9.47
DISCONNECT
BATTERIES OR ANY
OTHER MEANS OF STARTING.
WARNING
Fig. 18