Ski-Doo FORMULA III, Shop Manual

Page: 138 / 356

Section 04 ENGINE
Sub-Section 07 (AXIAL FAN COOLING SYSTEM)
04-07-2
NOTE : The following procedures can be
done without removing engine from chassis.
CLEANING
Clean all metal components in a non-ferrous met-
al cleaner.
DISASSEMBLY AND ASSEMBLY
17, Fan Nut
Remove fan protector.
To remove or install fan pulley retaining nut, lock
fan pulley with special holder wrench (P / N 420
8763 57). At assembly, torque nut to 55 N•m (41
lbf•ft).
TYPICAL
13,14,15,16,20, Distance Sleeve, Pulley
Halves, Shim and V-belt
Fan belt deflection must be as specified when ap-
plying the proper force midway between pulleys.
1. Deflection
To adjust tension, add or remove shim(s) between
pulley halves. Install excess shim(s) between dis-
tance sleeve and half pulley (housing side).
1. Unused shim(s) here
2. Adjust here
3. Positioning noses
4. Some engines only
Some engines have a separate metal pulley half
instead of using back of fan as pulley half. On first
mentioned engines, select pulley halves so that
the one with two positioning noses will be on fan
side. Ensure to insert these noses into fan notch-
es.
ENGINE
TYPE
BELT
DEFLECTION
FORCE
APPLIED
503 9.5 mm (3/8 in) 5 kg (11 lb)
'
A09C08A
420 8763 57
A09C0JA
1
1
2
3
4
A09C0VA