John Deere stx38 - Manual (Page 63)

4/23/97
3 - 31
ENGINE REPAIR
REPAIR
REMOVE AND INSTALL ENGINE
1. Turn all switches OFF and disconnect battery
negative (-) cable.
2. Raise hood to disconnect springs (A) from
mounting brackets on front tractor frame.
3. Lower hood and pull forward to remove.
4. Disconnect optional fuel shut-off solenoid wire (D),
if installed and cut tie straps (B) to separate yellow
lead (C) from engine. Air filter assembly removed
for clarity purposes only.
5. Turn fuel shut-off valve (F) to OFF position or pinch
hose (E) close to carburetor.
6. Loosen clamp (H) to disconnect throttle cable (I).
7. Disconnect fuel line (E) at carburetor to drain fuel.
Disconnect harness connector (G).
8. Disconnect wires from starter terminal (J).
9. Remove shield (L) and muffler (K).
10. Remove PTO clutch (see Remove and Install PTO
Clutch in Electrical Section).
11. Remove four cap screws (M), 3 washers and
disconnect ground lead (N), then remove engine.
12. Install engine and ground lead (N), as shown. Use
medium strength thread lock and sealer. Tighten
four cap screws (M) (use 1 washer per cap screw
except ground cable cap screw) to specification.
13. Install muffler, new gasket, and shield. Tighten
muffler nuts to specification.
14. Install PTO clutch (see Remove and Install PTO
Clutch in Electrical Section).
15. Make all electrical wiring connections, including
battery (negative cable last).
16. Connect and adjust throttle cable (see Tests and
Adjustments, earlier in this section).
17. Connect fuel line and adjust carburetor (see Tests
and Adjustments, earlier in this section).
Specifications:
Engine Cap Screws
. . . . . . . . . . . . . . . . . 27—46 N•m (240—408 lb-in.)
Muffler Mounting Nuts . . . . . . . . 24 N•m (216 lb-in.)
M55812
A
D
M55908
B
C
M58326
E
I
F
H
G
c
CAUTION
Gasoline is explosive. Do not expose to flame or
spark. Serious injury can result. Store in a
properly marked, safe container. Wipe-up any
spills IMMEDIATELY.
M55814
J
K
L
M55799
M
N