Motorcraft Starting System Specifications - Jeep 1987 Wrangler Workshop Manual

ELECTRICAL
STARTING SYSTEM - MOTORCRAFT (6-Cyl. Engine)
GENERAL INFORMATION
C A U T I O N : Starter motor solenoids used in
previous years (before solid-state ignitions) look
similar to the solenoids presently used but are
very different internally. Use of the wrong type
solenoid can damage the neutral safety switch.
Verify the part number stamped on the
replacement solenoid before installation.
The Motorcraft starting system, used with six-
cylinder engines, consists of a lightweight
positive engagement starter motor, a starter
motor solenoid, an ignition/start switch, circuits
protected by fusible links and the battery.
V e h i c l e s e q u i p p e d with an a u t o m a t i c
transmission also have a neutral safety switch.
The Motorcraft starter motor has a moveable
pole shoe and appropriate linkage to engage the
drive mechanism. Inside the drive assembly, an
overrunning clutch prevents the starter motor
from being driven by the ring gear.
MOTORCRAFT STARTING SYSTEM
SPECIFICATIONS
Item
Specifications
Frame diameter 114.3 mm (4.5 in)
Brush Length
12.7 mm (0.5 in)
Wear Limit
6.35 mm (0.25 in)
No Load Test
(Free Speed)
Volts
Amps
Min. RPM
Max. RPM
12
67
7380
9356
Contact Point
Clearance
2.5-0.5 mm
(0.100-0.020
in)
1.5 mm (0.060 in) preferred
840233
C A U T I O N : Starter motor solenoids are
equipped with both blade terminals and long
studs. The blade terminals are attached to the
long studs and held in place by retaining nuts.
Loosening of the retaining nuts could cause the
loss of internal connections and necessitate
replacement of the solenoid.
TORQUE SPECIFICATIONS
Component Service Set-To Torque
Service Recheck Torque
Neutral Safety Switch-to-
Transmission Case
Starter Motor-to-Flywheel/
Converter Housing
Starter Terminal Screw
23 N-m (17 ft-lbs)
24 N-m (18 ft-lbs)
6 N-m (55 in-lbs)
19-28 N-m (14-21 ft-lbs)
18-34 N-m (13-25 ft-lbs)
4.5 - 9 N-m (40-70 in-lbs)
C-30