Starter Chevrolet Pickup V3500

DESCRIPTION

For identification, starter part numbers are stamped on the outside of the frame or on an identification label attached to the frame.

TROUBLE SHOOTING

Note. See the TROUBLE SHOOTING - BASIC PROCEDURES article in the GENERAL TROUBLE SHOOTING section.

ON-VEHICLE TESTS

Note. Tests are performed with all leads disconnected from solenoid. Complete tests in minimum amount of time to prevent solenoid from overheating.

Hold-In Winding

1. Connect an ammeter, voltmeter, carbon pile and battery into starter circuit. (Scheme 1) Using carbon pile, decrease battery voltage to 10 volts.
2. Refer to «SOLENOID HOLD-IN WINDING SPECIFICATIONS»(/chevrolet/pickup-v3500/1989-1991/remont/starter/#starter) table for correct amperage reading. Higher reading indicates winding is shorted or grounded. Lower reading indicates excessive resistance.

SOLENOID HOLD-IN WINDING SPECIFICATIONS

Scheme 1

Pull-In Winding

Using the solenoid test connections as shown in the illustration, decrease battery voltage to 5 volts. (Scheme 2) Refer to the SOLENOID PULL-IN WINDING SPECIFICATIONS table for correct amperage draw. Higher reading indicates winding is shorted or grounded. Lower reading indicates excessive resistance.

Note. To prevent overheating of pull-in winding, DO NOT energize for more than 15 seconds. Current draw will decrease as winding temperature increases.

SOLENOID PULL-IN WINDING SPECIFICATIONS

Scheme 2

1. Connect a tachometer, ammeter and voltmeter into start circuit. (Scheme 3) Using carbon pile, adjust voltage to 10 volts and engage starter motor.
2. Read amperage draw and armature speed to ensure they are within specification. See STARTER NO-LOAD SPECIFICATIONS TABLE. If exact voltage cannot be obtained and voltage is slightly higher than specification, RPM should also be slightly higher. Alternatively, carbon pile may be adjusted to reduce voltage.
3. Low free speed (no load) and high current draw indicates too much friction, shorted armature, or grounded armature or fields. Failure to operate with high current draw indicates a direct ground in terminal or fields, or frozen bearings.
4. Failure to operate with no current draw indicates an open field, open armature coils, broken brush springs, worn brushes, or high commutator insulation.
5. If free speed (no load) is low and there is low current draw, suspect high internal resistance due to poor connection, defective leads, or dirty commutator. A high free speed and high current draw usually indicates shorted fields.

Scheme 3

On-Vehicle Cleaning

Clean all parts with a clean cloth. DO NOT clean armature, field coils, or drive assembly in any grease-dissolving solvents or damage to insulation and (starter) drive assembly will occur.

ARMATURE

Test armature for shorted coils with a growler. Check for grounded coils using a self-powered test light. Place one test lead on armature core or shaft, and other test lead on commutator. Light should not illuminate. If light illuminates, armature is grounded and should be replaced.

FIELD COILS (ENCLOSED HOUSING)

1. Disconnect field coil ground connections. Using self-powered test light, place one test lead on field coil frame and connect other test lead to field coil connector. If light illuminates, one or more coils are grounded and must be repaired or replaced.
2. Check for opens by placing test light across coil ends. Light should illuminate. If light does not illuminate, coils are open.
3. On SD-200 and SD-260 starters, coils cannot be replaced separately. The frame and fields must be replaced as a unit. On SD-300 and 28MT a pole shoe spreader and pole shoe screwdriver should be used to replace a defective field coil. Assemble pole shoe with long lip (if equipped) facing the direction of armature rotation.

BRUSHES, SPRINGS & HOLDERS

Replace brushes if worn to 1/2 original length, oil-soaked or pitted. Check brush spring tension and replace springs if weak or distorted.

DRIVE & PINION

Pinion should turn freely in overrun direction and should not slip in drive direction. Check spring for correct tension and drive collar for wear (these parts can be removed for replacement by forcing collar toward clutch and removing lock ring from end of tube). Replace drive assembly if pinion teeth are worn, chipped or cracked.

PINION CLEARANCE

1. Disconnect motor field coil connector from solenoid "M" terminal and insulate it carefully. Connect a battery from solenoid "S" terminal to solenoid frame. Momentarily flash a jumper lead from "M" terminal to solenoid frame.
2. This shifts pinion into cranking position. Push pinion back toward commutator end to eliminate slack. Distance between pinion and pinion stop should be .010-.160" (.25-4.06 mm). Clearance is not adjustable. If clearance is not within specification, check for worn parts.

Scheme 4

REMOVAL & INSTALLATION

Note. If shims are installed between starter and engine, note and record the arrangement for installation reference.

ALL MODELS EXCEPT "T" & "U" SERIES

1. Disconnect negative battery cable. Raise and support vehicle. Remove starter braces and shields (if equipped). Disconnect electrical wiring from starter solenoid.
2. Remove starter mounting bolts. Remove shims and note arrangement for reassembly. Remove starter. To install, reverse removal procedure. Ensure shims are installed in original location. Tighten bolts or nuts to specifications. See «TORQUE SPECIFICATIONS»(/chevrolet/pickup-v3500/1989-1991/remont/starter/#starter) at end of article.

"T" SERIES

1. Disconnect negative battery cable. Raise and support vehicle. Disconnect electrical wiring from starter solenoid. Remove mounting bracket and wiring from brush end of starter. Remove skid plate. Remove 2 brake line-to-crossmember brackets.
2. Remove 6 crossmember bolts and remove crossmember. Remove transmission cooler line-to-flywheel housing bracket. Remove brace rod to flywheel housing. Remove lower flywheel housing cover (if necessary).
3. Remove starter bolts. Note location and number of shims for reassembly. Remove starter. To install, reverse removal procedure. Tighten bolts and nuts to specifications.

"U" SERIES

1. Disconnect negative battery cable. Raise and support vehicle. Remove nut from A/C bracket. Remove engine bracket nut and bracket. Place drain pan under oil pan. Remove oil pressure sending unit. Remove oil filter.
2. Disconnect electrical wiring from starter. Remove starter bolts. Note location and number of shims for reassembly. Remove starter. To install, reverse removal procedure. Tighten bolts and nuts to specifications.

OVERHAUL

Overhaul information is not available. Refer to the figures for disassembly and reassembly reference. (Scheme 5)through (Scheme 7).

Scheme 5

Scheme 6

Scheme 7

STARTER NO-LOAD SPECIFICATIONS

TORQUE SPECIFICATION

TORQUE SPECIFICATIONS

See also:
• TROUBLE SHOOTING - BASIC PROCEDURES
• SOLENOID HOLD-IN WINDING SPECIFICATIONS