Repair pto clutch – John Deere stx38 User Manual

Page 160

4 - 76

3/21/97

REPAIR

ELECTRICAL

16. Install and tighten cap screws to specification.
17. Remove feeler gauge and connect wire (D) to

terminal.

Specifications:

Ignition Module Air Gap . . . . . . . . 0.25mm (0.01 in.)
Ignition Module Cap Screws

. . . . . . . . . . . . . . . . . . . . . 4.0—6.2 N•m (35–55 lb-in.)

Stator Cap Screws . . . . . . . . . . . . . . 4 N•m (35 lb-in.)
Flywheel Cap Screw . . . . . . . . . . . . 68 N•m (50 lb-ft)

REPAIR PTO CLUTCH

NOTE: If there excessive vibration in PTO clutch area

and noise coming from vibration between PTO
clutch and pin see step 5.

Removal:

1. Lower mower deck and remove mower deck drive

belt from PTO clutch sheave.

NOTE: PTO clutch is not serviceable, entire clutch

must be replaced. Drive sheave is serviceable.
Gear drive unit shown, hydrostatic version
uses same procedure.

2. Disconnect electrical connector (A).
3. Disengage traction drive belt tension spring (F).

NOTE: To remove cap screw (C) keep crankshaft from

turning using flats of bushing/washer (B).

4. Remove cap screw (C), bushing/washer (B), PTO

clutch assembly, and spacer (G).

5. STX38 (M00STXC210000—270000)

STX38 (M00STXD210000—270000)
STX38 (M00STXE240000—270000)
STX46 (M00STXF240000—270000)
STX46 (M00STXG240000—270000)
The relationship between the hub ends and bore
of the drive sheave is critical. Drive sheave (A) hub
ends must be perpendicular to bore. Replacement
of the drive sheave (A) in most cases will solve the
vibration problem. If drive sheave replacement
does not reduce vibration, then check crankshaft
alignment.

Installation:

NOTE: Coat crankshaft, inside of spacer (G), and

inside bore of PTO clutch with NEVER-SEEZ
before installing spacer (G) and PTO clutch
assembly.

6. Install spacer (G) and PTO clutch on crankshaft so

pin (D) of belt guide sticks through anchor slot (E)
of clutch.

7. Tighten cap screw (C) to specification.
8. Align traction drive belt with sheave and engage

traction drive belt tension spring ( F).

9. Connect wire connector (A).

10. Install mower deck drive belt.

Specification:

PTO Clutch Assembly Cap Screw

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 N•m (55 lb-ft)

M42772

M85806