John Deere stx38 User Manual

Page 217

3/20/97

5 - 53

POWER TRAIN

REPAIR

TRACTION DRIVE BELT REMOVAL/
INSPECTION/INSTALLATION—
STX38 & STX46 LATE MODEL

NOTE: If drive belt is in good condition, it doesn’t to be

completely removed to take out the transaxle.
Just lock the park brake to disengage it from
the transaxle drive sheave.

Removal:

1. Park tractor on level surface.
2. Remove mower deck.
3. Safely raise and block tractor to gain easy access

to underside of frame.

4. Depress and lock pedal (A) into park with lever (F).
5. Remove front idler belt guide and sheave (D).
6. Remove PTO clutch assembly (B) and engine drive

sheave (C).

7. Disconnect both steering rods (E) from steering

yoke.

8. Remove bellcrank idler belt guide (G).
9. Remove adjustable idler belt guide (H).

10. Remove park lever (F).
11. Remove belt from transaxle drive sheave (I).
12. Remove belt from traction drive idlers and

remaining belt guides.

Inspection:

1. Examine belt to determine if it is worn, strecthed,

cracked, frayed, or damaged beyond the point of
continued use.

2. Measure and compare removed belt to following

new belt dimensions:

Effective length . . . . . . . 2660±8 mm (104.7±0.3 in.)
Minimum effective length

(short) . . . . . . . . . . . . . . . . . . . 2631 mm (103.6 in.)

Maximum effective length

(long) . . . . . . . . . . . . . . . . . . . . 2710 mm (106.7 in.)

Effective top width . . . . . . . . . . . 13.5 mm (0.53 in.)
Minimum effective top width. . . . . . 11 mm (0.43 in.)
Effective bottom width . . . . . . . . . . 7.5 mm (0.3 in.)
Minimum effective bottom width . . . . 5 mm (0.2 in.)
Effective depth . . . . . . . . . . . . . . . . 9.5 mm (0.37in.)
Minimum effective depth . . . . . . . . . . 7 mm (0.28 in.)

3. Replace belt if any of above dimensions are not

found.

Installation:

1. Install drive belt through rear belt guide (A) and

over transaxle drive sheave (B).

M42538

M42768