Cadillac 10465394 Motor Asm,Start (Remanufacture) Sd200

To remove and install the starter, begin by disconnecting the negative battery cable and raising the car on jackstands. Remove any starter braces or shields in the way, then remove the starter motor-to-engine bolts and allow the starter to drop down. Disconnect the solenoid wires and battery cable before removing the starter. To replace the solenoid, remove the starter from the vehicle and remove the screw and washer from the motor connector strap terminal. Remove the screws retaining the solenoid housing to the end frame assembly and twist the solenoid clockwise to remove the flange key from the keyway slot. Remove the solenoid assembly and install the new one by positioning the solenoid body on the drive housing and turning it counterclockwise to engage the flange key in the keyway slot. Install the screws to retain the solenoid housing to the end frame. For an overhaul, start by removing the starter from the vehicle and disconnecting the field coil straps from the solenoid. Remove the through-bolts to separate the commutator end frame, field frame assembly, drive housing, and armature assembly. On diesel starters, remove the insulator from the end frame and the shift lever pivot bolt. On 25 MT diesel starters, remove the center bearing screws and the drive gear housing from the armature shaft. Slide off the 2-piece thrust collar from the armature shaft and use a piece of pipe or socket to drive the retainer toward the snapring. Remove the snapring with pliers and slide off the retainer and starter drive. To reinstall, lubricate the armature shaft and install the starter drive and retainer. Place the snapring on the shaft and tap it into place. Slide the retainer and thrust collar onto the shaft and squeeze them together with pliers. Lubricate the drive housing bushing and engage the shift lever yoke with the clutch. Install the drive assembly into the drive gear housing and reassemble the remaining components. For brush replacement, disconnect the field coil from the motor solenoid terminal and remove the starter through bolts. Remove the commutator end frame and washer, then remove the field frame and armature assembly from the drive housing. Remove the brush holder pivot pin, brush springs, and brushes. Install the new brushes and reassemble the components in reverse order.

To install the brush assembly to the field frame, first, install the brushes to their holders and then assemble the insulated and grounded brush holders together with the V-spring and locate the unit on its support pin. Push the holders and spring to the bottom of the support and rotate the spring to engage the V in the support slot. Connect the ground wire to the ground brush and the field lead wire to the insulated brush and repeat the operations for the second set. Smear silicone oil onto the drive end of the armature shaft and slide the clutch assembly (pinion to the front) onto the shaft, followed by sliding the pinion stop/retainer onto the shaft with its open end facing away from the pinion. Stand the armature vertically on a piece of wood, position the snap-ring on the end of the shaft, and using a hammer and a piece of hardwood, drive the snap-ring onto the shaft. Slide the snap-ring until it drops into its groove. Install the thrust collar on the shaft so that the shoulder is next to the snap-ring and use pliers to squeeze the thrust collar and stop/retainer together until the snap-ring fully enters the retainer.

Disconnect the negative battery cable. Raise the rear of the vehicle and support it securely on jackstands. Block the front wheels. Remove the catalytic converter splash shield. From under the vehicle, disconnect the solenoid wire and battery cable from the terminals on the rear of the solenoid. Remove the support bracket, if equipped, and retaining bolts. Remove the starter. Note the location of the spacer shim. Place the starter in position. Install the spacer shim. Install the support bracket, if equipped, and tighten the starter mounting bolts. Attach the solenoid wire and battery cable to the terminals on the rear of the solenoid. Lower the vehicle. Connect the negative battery cable.

Ensure that the battery is fully charged before diagnosing starter problems. In case the switch is operated and the starter does not turn, make sure the shift lever is in Neutral or Park (automatic transmission) or that you depress the clutch pedal (manual transmission). Check that your battery is charged and all cables are secure. This could mean a slipping overrunning clutch in the starter, which can call for removal and disassembly of the starter. It could be with your battery, main solenoid contacts or even the starter itself if solenoid clicks but there is no operation on the starter. It may be defective if you can't hear solenoid plunger when switch is actuated, this could be due to defective solenoid or solenoid circuit. Attach a jumper lead between (+) terminal of battery and S terminal on solenoid to test solenoid condition. If starter works, then there's nothing wrong with it; instead; problem lies either in wiring, neutral start switch or ignition switch. If still no operation take out the starter/solenoid assembly for further testing and repair. Make sure your battery is charged and all terminal connections are tight if Starter cranks engine slowly at low speed. Slow starting may result from partial seizure of engine or presence of oil with wrong viscosity in it. Allow the engine to reach its normal operating temperature before testing the starter, then disconnect coil wire from distributor cap and ground it on engine block after which take voltmeter readings as follows: Connect positive lead of volt meter to S terminal on solenoid and negative one to ground; have someone turn ignition switch on while you keep an eye out for any change in voltage readings on voltmeter; do not forget that 9-volts or more reading means faulty Starter provided normal cranking speed persists while less than 9-volts reading suggests slow cranking speed caused by burned solenoid contacts.

Disconnect the ground cable from the battery.

In extreme cases, it may be necessary to unbolt the mounts and raise the engine slightly.

To test the starter motor's performance with a voltmeter, run the engine until it reaches normal operating temperature, then disconnect the coil wire from the distributor cap and ground it on the engine. Connect a voltmeter positive lead to the positive battery post and the negative lead to the negative post. Crank the engine and take voltmeter readings as soon as a steady figure is indicated, not exceeding 15 seconds of starter motor turning. A reading of 9 volts or more at normal cranking speed is normal. If the cranking speed is slow and the reading is less than 9 volts, it could indicate various issues like burned solenoid contacts, a bad starter motor, discharged battery, or a bad connection.

Ensure the battery is fully charged, all connections are tight, the engine oil is of the correct grade, and there are no mechanical faults.

Disconnect the ground cable from the battery, then raise the vehicle to a satisfactory working height.

The location of any shims used.