ST37x Operator’s Manual Service - 85
500 Hour
Change Water Separator Filter
Change water separator filter every 500 hours.
1. Turn off at valve (1).
2. Purge fuel out of filter by unscrewing bottom
drain plug (2).
3. Unscrew bottom of filter (3).
4. Replace filter (4).
5. Screw bottom of filter back on.
6. Turn on at valve.
Change Fan Belt
Change fan belt every 500 hours. Belt is properly
tensioned when it moves about 1/4-3/8” (7-9 mm)
when pushed at the long span (shown).
To change:
1. Loosen two alternator bolts (1,2).
2. Replace fan belt. Adjust position as needed.
3. Tighten bolts.
4. Check tension.
1
2
3
4
t54om025h.epst54om025h.eps
11
22
t54om012h.epst54om012h.eps