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MAINTENANCE
4.10.2 RADIATOR FAN BELT AND AUTOMATIC BELT TENSIONER -
MAINTENANCE CHECK
Before starting the maintenance check, set the maintenance
safety switch to 0. Refer to page 131 for location. In the 0
position the engine cannot be started. Secure by inserting a
padlock into the holes of the switch. Up to three padlocks
can be attached.
Legend for illustration Z25518
(1)
Radiator fan guard door
(2)
Nuts
(3)
Stud for fastening the guard door in open position
(4)
Fan hub carrier
(5)
Fan belt
(6)
Fan belt tensioner spring
(7)
Control rod (turn buckle) of the fan belt tensioner
(8)
Grease fitting for lubrication of the belt tensioner spring
(9)
Grease fitting for lubrication of the fan hub
(10)
Grease fitting for lubrication of the engine support bracket
(11)
Sump for collecting excess lubricant
Fan Belt Inspection
1. Remove nuts (2) and open the fan guard door (1) until the
upper hole (2) engages on stud (3). Fasten the door in this
position by attaching one of the removed nuts to stud (3).
2. Check the Poly-Vee belt (5) for intersecting cracks. Longitudi-
nal (direction of belt length) cracks that intersect with trans-
verse cracks are not acceptable. Replace the belt if it is
frayed or has pieces of material missing. Refer to the Engine
Operation and Maintenance Manual filed in volume 2 binder
for replacement procedure.
Fan Bearing Lubrication
The bearings of fan hub can be lubricated via grease fitting (9).
Lubrication should only be done, if there are signs of grease loss.
Before removing the sump (11), clear the area of excess or over-
flowing grease. Apply grease gun to the fitting (9) and fill the bear-
ing with one or two strokes of the grease gun.
REMARK
DO NOT overfill with grease otherwise the seal ring of
the hub could be damaged.
WARNING
4.10 EVERY 250 OPERATING HOURS OR MONTHLY
317
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