Jeep CJ 1945-1970 Repair Information

Starter

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REMOVAL & INSTALLATION



See Figures 1 through 9



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Fig. Fig. 1: To remove the starter motor, first loosen ...



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Fig. Fig. 2: ... and remove the wiring's retaining nut and washer ...



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Fig. Fig. 3: ... then remove all wires from the starter motor terminal-4-134 engine shown



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Fig. Fig. 4: Detach the starter drive return spring from the drive arm



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Fig. Fig. 5: Remove the starter motor's side mounting bracket retaining bolt ...



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Fig. Fig. 6: ... then remove the starter motor rear mounting bracket bolt



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Fig. Fig. 7: Loosen the starter motor's lower mounting bolt ...



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Fig. Fig. 8: ... then remove it from the starter motor and engine block



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Fig. Fig. 9: Support the motor and remove the other mounting bolt

The starter on the 4-134 L and F-head engines and 6-226 engines can be removed from the top of the engine. The starter motor on all other engines must be removed from beneath the vehicle.

  1. Disconnect the negative battery cable.
  2.  
  3. On Jeep models equipped with either the 6-225 and 6-230 engines, raise and safely support the vehicle on jackstands.
  4.  
  5. Remove all wires from the starter and tag them for installation.
  6.  
  7. Remove all but one upper attaching bolt, support the starter (it's heavier than it looks) and remove the last bolt.
  8.  
  9. Pull the starter from the engine.
  10.  
  11. Installation is the reverse of removal. Tighten the mounting bolts to:

    4-134 and 6-225 engines-25 ft. lbs. (34 Nm)
     
    6-226 and 6-230 engines-30 ft. lbs. (41 Nm)
     

  12.  

STARTER DRIVE REPLACEMENT



Autolite
  1. Remove the cover of the starter drive's actuating lever arm.
  2.  
  3. Remove the through-bolts, starter drive gear housing, and the return spring of the driver gear's actuating lever.
  4.  
  5. Remove the pivot pin, which retains the starter gear actuating lever, then remove the lever and armature.
  6.  
  7. Remove the stop ring retainer. Remove and discard the stop ring which holds the drive gear to the armature shaft, then remove the drive gear assembly.
  8.  

To install:
  1. Lightly lubricate the armature shaft splines with Lubriplate® and install the starter drive gear assembly on the shaft.
  2.  
  3. Install a new stop ring and stop ring retainer.
  4.  
  5. Position the starter drive gear actuating lever to the frame and starter drive assembly. Install the pivot pin.
  6.  
  7. Fill the starter drive gear housing 1 / 4 full of grease.
  8.  
  9. Position the drive actuating lever return spring and the drive gear housing to the frame, then install and tighten the through-bolts.
  10.  

Be sure that the stop ring retainer is properly seated in the drive housing.

Delco-Remy
  1. Remove the through-bolts.
  2.  
  3. Remove the starter drive housing.
  4.  
  5. Slide the two piece thrust collar off the end of the armature shaft.
  6.  
  7. Slide a standard 1 / 2 in. (13mm) pipe coupling, or other spacer, onto the shaft so that the end of the coupling butts against the edge of the retainer.
  8.  
  9. Tap the end of the coupling with a hammer, driving the retainer toward the armature end of the snapring.
  10.  
  11. Remove the snapring from its groove in the shaft with pliers. Slide the retainer and the starter drive from the armature.
  12.  

To install:
  1. Lubricate the drive end of the shaft with silicone lubricant.
  2.  
  3. Slide the drive gear assembly onto the shaft, with the gear facing outward.
  4.  
  5. Slide the retainer onto the shaft with the cupped surface facing away from the gear.
  6.  
  7. Stand the whole starter assembly on a block of wood with the snapring positioned on the upper end of the shaft. Drive the snapring down with a small block of wood and a hammer. Slide the snapring into its groove.
  8.  
  9. Install the thrust collar onto the shaft with the shoulder next to the snapring.
  10.  
  11. With the retainer on one side of the snapring and the thrust collar on the other side, squeeze them together with a pair of pliers until the ring seats in the retainer. On models without a thrust collar, use a washer. Remember to remove the washer before installing the starter in the engine.
  12.  

Prestolite
  1. Slide the thrust collar off the armature shaft.
  2.  
  3. Using a standard 1 / 2 in. (13mm) pipe connector, drive the snapring retainer off the shaft.
  4.  
  5. Remove the snapring from the groove, and then remove the drive assembly.
  6.  

To install:
  1. Lubricate the drive end and splines with Lubriplate®.
  2.  
  3. Install the clutch assembly onto the shaft.
  4.  
  5. Install the snapring retainer with the cupped surface facing toward the end of the shaft.
  6.  
  7. Install the snapring into the groove. Use a new snapring, if necessary.
  8.  
  9. Install the thrust collar onto the shaft with the shoulder against the snapring.
  10.  
  11. Force the retainer over the snapring in the same manner as was used for the Delco-Remy starters.
  12.  

SOLENOID OR RELAY REPLACEMENT



Autolite

On the early CJ-2A, CJ-3A, CJ-3B, CJ-5, and CJ-6 with Autolite starters, there were no solenoids or relays to activate the starter drive. The starter drive activated itself by the centrifugal force of the starter motor and deactivated itself in the normal way (by the centrifugal force of the engine's flywheel).

Autolite starters were installed with solenoids mounted on the starter housing beginning in 1960.

To remove the solenoid from the starter, remove all of the leads to the solenoid, remove the connecting lever, and remove the attaching bolts that hold the solenoid assembly to the starter housing. Remove the solenoid assembly from the starter housing.

To install the solenoid assembly, reverse the removal procedure.

Delco-Remy
  1. Remove the leads from the solenoid.
  2.  
  3. Remove the drive housing from the starter motor.
  4.  
  5. Remove the shift lever pin and bolt from the shift lever.
  6.  
  7. Remove the attaching bolts that hold the solenoid assembly to the housing of the starter motor.
  8.  
  9. Remove the starter solenoid from the starter housing.
  10.  
  11. To install the solenoid, reverse the removal procedure.
  12.  

Prestolite
  1. Remove the leads from the solenoid assembly.
  2.  
  3. Remove the attaching bolts that hold the solenoid to the starter housing.
  4.  
  5. Remove the bolt form the shift lever.
  6.  
  7. Remove the solenoid assembly from the starter housing.
  8.  
  9. Reverse the procedure for installation.
  10.  

STARTER OVERHAUL



See Figures 10, 11 and 12



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Fig. Fig. 10: Exploded view of the starter motor used on 4-134 engines



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Fig. Fig. 11: Exploded view of the starter motor used on 6-230 engines



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Fig. Fig. 12: Exploded view of the Delco starter motor used on 6-225 engines

Autolite/Motorcraft
DISASSEMBLY
  1. Remove the cover screw, the cover through-bolts, the starter drive end housing and the starter drive plunger lever return spring.
  2.  
  3. Remove the starter gear plunger lever pivot pin, the lever and the armature. Remove the stop ring retainer and the stop ring from the armature shaft (discard the ring), then the starter drive gear assembly.
  4.  
  5. Remove the brush end-plate, the insulator assembly and the brushes from the plastic holder, then lift out the brush holder. For reassembly, note the position of the brush holder with respect to the end terminal.
  6.  
  7. Remove the two ground brush-to-frame screws.
  8.  
  9. Bend up the sleeve's edges which are inserted in the frame's rectangular hole, then remove the sleeve and the retainer. Detach the field coil ground wire from the copper tab.
  10.  
  11. Remove the three coil retaining screws. Cut the field coil connection at the switch post lead, then remove the pole shoes and the coils from the frame.
  12.  
  13. Cut the positive brush leads from the field coils (as close to the field connection point as possible).
  14.  
  15. Check the armature and the armature windings for broken or burned insulation, open circuits or grounds.
  16.  
  17. Check the commutator for run-out. If it is rough, has flat spots or is more than 0.005 in. (0.127mm) out-of-round, reface the commutator face.
  18.  
  19. Inspect the armature shaft and the two bearings for scoring and excessive wear, then replace it (if necessary).
  20.  
  21. Inspect the starter drive. If the gear teeth are pitted, broken or excessively worn, replace the starter drive.
  22.  

The factory brush length is1/2in. (13mm); the wear limit is1/4in. (6mm).

ASSEMBLY
  1. Install the starter terminal, the insulator, the washers and the nut in the frame.
  2.  

Be sure to position the screw slot perpendicular to the frame end surface.

  1. Position the coils and the pole pieces, with the coil leads in the terminal screw slot, then install the screws. When tightening the pole screws, strike the frame with several sharp hammer blows to align the pole shoes, then stake the screws.
  2.  
  3. Install the solenoid coil and the retainer, then bend the tabs to hold the coils to the frame.
  4.  
  5. Using resin-core solder and a 300 watt iron, solder the field coils and the solenoid wire to the starter terminal. Check for continuity and ground connections of the assembled coils.
  6.  
  7. Position the solenoid coil ground terminal over the nearest ground screw hole and the ground brushes-to-starter frame, then install the screws.
  8.  
  9. Apply a thin coating of Lubriplate® on the armature shaft splines. Install the starter motor drive gear assembly-to-armature shaft, followed by a new stop ring and retainer. Install the armature in the starter frame.
  10.  
  11. Position the starter drive gear plunger lever to the frame and the starter drive assembly, then install the pivot pin. Place some grease into the end housing bore. Fill it about 1 / 4 full, then position the drive end housing to the frame.
  12.  
  13. Install the brush holder and the brush springs. The positive brush leads should be positioned in their respective brush holder slots, to prevent grounding problems.
  14.  
  15. Install the brush end-plate. Be certain that the end-plate insulator is in the proper position on the end-plate.
  16.  
  17. Install the two starter frame through-bolts and tighten them to 55-75 inch lbs. (6.2-8.4 Nm).
  18.  
  19. Install the starter drive plunger lever cover and tighten the retaining screw.
  20.  

Delco-Remy
DISASSEMBLY
  1. Detach the field coil connectors from the motor solenoid terminal. If equipped, remove solenoid mounting screws.
  2.  
  3. Remove the through-bolts, the commutator end frame, the field frame and the armature assembly from drive housing.
  4.  
  5. Remove the over-running clutch from the armature shaft as follows:
    1. Slide the two piece thrust collar off the end of the armature shaft.
    2.  
    3. Slide a standard 1 / 2 in. (13mm) pipe coupling or other spacer onto the shaft, so that the coupling end butts against the retainer edge.
    4.  
    5. Using a hammer, tap the coupling end, driving the retainer towards the armature end of the snapring.
    6.  
    7. Using snapring pliers, remove the snapring from its groove in the shaft, then slide the retainer and the clutch from the shaft.
    8.  

  6.  
  7. Disassemble the field frame brush assembly by releasing the V-spring and removing the support pin. The brush holders, the brushes and the springs can now be pulled out as a unit and the leads disconnected.
  8.  

On the integral frame units, remove the brush holder from the brush support and the brush screw.

  1. If equipped, separate the solenoid from the lever housing.
  2.  

CLEANING AND INSPECTION
  1. Clean the parts with a rag. Do not immerse the parts in a solvent.
  2.  


WARNING
Immersion in a solvent will dissolve the grease that is packed in the clutch mechanism. It will damage the armature and the field coil insulation.

  1. Test the over-running clutch action. The pinion should turn freely in the overrunning direction but must not slip in the cranking direction. Check that the pinion teeth have not been chipped, cracked or excessively worn. Replace the unit (if necessary).
  2.  
  3. Inspect the armature commutator. If the commutator is rough or out of round, it should be machined and undercut.
  4.  

Undercut the insulation between the commutator bars by1/32in. (0.794mm). The undercut must be the full width of the insulation and flat at the bottom. A triangular groove will not be satisfactory. Most late model starter motor use a molded armature commutator design. No attempt to undercut the insulation should be made or serious damage may result to the commutator.

ASSEMBLY
  1. Install the brushes into the holders, then install the solenoid (if equipped).
  2.  
  3. Assemble the insulated and the grounded holder together.
  4.  
  5. Using the V-spring, position and assemble the unit on the support pin.
  6.  
  7. Push the holders and the spring to bottom of the support, then rotate the spring to engage the slot in the support.
  8.  
  9. Attach the ground wire to the grounded brush and the field lead wire to the insulated brush, then repeat this procedure for other brush sets.
  10.  
  11. Assemble the over-running clutch to the armature shaft as follows:
    1. Lubricate the drive end of the shaft with silicone lubricant.
    2.  
    3. Slide the clutch assembly onto the shaft with the pinion outward.
    4.  
    5. Slide the retainer onto the shaft with the cupped surface facing away from the pinion.
    6.  
    7. Stand the armature up on a wood surface with the commutator downward. Position the snapring on the upper end of the shaft and drive it onto the shaft with a small block of wood and a hammer, then slide the snapring into groove.
    8.  
    9. Install the thrust collar onto the shaft with the shoulder next to snapring.
    10.  
    11. With the retainer on one side of the snapring and the thrust collar on the other side, squeeze two sets together (with pliers) until the ring seats in the retainer. On models without a thrust collar use a washer. Remember to remove the washer before continuing.
    12.  

  12.  
  13. Lubricate the drive end bushing with silicone lubricant, then slide the armature and the clutch assembly into place, while engaging the shift lever with the clutch.
  14.  

On the non-integral starters, the shift lever may be installed in the drive gear housing first.

  1. Position the field frame over the armature and apply sealer (silicone) between the frame and the solenoid case. Position the frame against the drive housing, making sure the brushes are not damaged in the process.
  2.  
  3. Lubricate the commutator end bushing with silicone lubricant, place a washer on the armature shaft and slide the commutator end frame onto the shaft. Install the through-bolts and tighten.
  4.  
  5. Reconnect the field coil connections to the solenoid motor terminal. Install the solenoid mounting screws (if equipped).
  6.  
  7. Check the pinion clearance. It should be 0.010-0.140 in. (0.254-3.556mm) with the pinion in the cranking position, on all models.
  8.  

Prestolite
DISASSEMBLY AND ASSEMBLY
  1. To remove the solenoid, remove the screw from the field coil connector and solenoid mounting screws. Rotate the solenoid 90 degrees and remove it along with the plunger return spring.
  2.  
  3. For further service, remove the two through-bolts, then remove the commutator end frame and washer.
  4.  
  5. To replace the clutch and drive assembly proceed as follows:
    1. Remove the thrust washer or the collar from the armature shaft.
    2.  
    3. Slide a 5 / 8 in. deep socket or a piece of pipe of suitable size over the shaft and against the retainer as a driving tool.
    4.  
    5. Tap the tool to remove the retainer off the snapring.
    6.  
    7. Remove the snapring from the groove in the shaft. Check and make sure the snapring isn't distorted. If it is, it will be necessary to replace it with a new one upon reassembly.
    8.  
    9. Remove the retainer and clutch assembly from the armature shaft.
    10.  

  6.  
  7. The shift lever may be disconnected from the plunger at this time by removing the roll pin.
  8.  
  9. On models with the standard starter, the brushes may be removed by removing the brush holder pivot pin which positions one insulated and one grounded brush. Remove the brush and spring and replace the brushes as necessary.
  10.  
  11. On models with the smaller 5MT starter, remove the brush and holder from the brush support, then remove the screw from the brush holder and separate the brush and holder. Replace the brushes as necessary.
  12.  
  13. Installation is the reverse of removal. Assemble the armature and clutch and drive assembly as follows:
    1. Lubricate the drive end of the armature shaft and slide the clutch assembly onto the armature shaft with the pinion away from the armature.
    2.  
    3. Slide the retainer onto the shaft with the cupped side facing the end of the shaft.
    4.  
    5. Install the snapring into the groove on the armature shaft.
    6.  
    7. Install the thrust washer on the shaft.
    8.  
    9. Position the retainer and thrust washer with the snapring in between. Using two pliers, grip the retainer and thrust washer or collar and squeeze until the snapring is forced into the retainer and is held securely in the groove in the armature shaft.
    10.  
    11. Lubricate the drive gear housing bushing.
    12.  
    13. Engage the shift lever yoke with the clutch and slide the complete assembly into the drive gear housing.
    14.  

  14.  

When the starter motor is disassembled or the solenoid is replaced, it is necessary to check the pinion clearance. Pinion clearance must be correct to prevent the buttons on the shift lever yoke from rubbing on the clutch collar during cranking.

CHECKING PINION CLEARANCE
  1. Disengage the motor field coil connector from the solenoid motor terminal and insulate it carefully.
  2.  
  3. Connect one 12 volt battery lead to the solenoid switch terminal and the other to the starter frame.
  4.  
  5. Flash a jumper lead momentarily from the solenoid motor terminal to the starter frame. This will shift the pinion into cranking position and it will remain there until the battery is disconnected.
  6.  
  7. Push the pinion back as far as possible to take up any movement, and check the clearance with a feeler gauge. The clearance should be 0.010-0.140 in. (0.254-3.556mm).
  8.  
  9. There are no means for adjusting pinion clearance on the starter motor. If clearance does not fall within the limits, check for improper installation and replace all worn parts.
  10.  

 
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