John Deere CD4039DF008 - Manual (Page 51)

Maintenance/500 hours
DPSG,CD03523,57 –19–16AUG99–1/1
CHECKING BELT (POWERTECH ENGINES
WITH MANUAL TENSIONER)
RG9132
–UN–04OCT99
A—Belt gauge
B—Cap screw
C—Cap screw
Inspect belt for cracks, fraying, or stretched out areas.
Replace if necessary.
NOTE: Belt adjustment is measured using a gauge
stamped on the top edge of the alternator bracket.
1. Loosen cap screws (B) and (C).
2. Slide alternator in slot by hand to remove all excess
slack in belt.
IMPORTANT: Do not pry against alternator rear frame.
3. Using the gauge (A) on the alternator bracket, stretch
belt by prying outward on alternator front frame.
Stretch the belt 1 gauge unit for a used belt and 1.5
gauge units for a new belt.
4. Tighten cap screws (B) and (C).
30-5
112699
PN=51