Remy 50MT DELCO REMY HEAVY DUTY STARTING MOTORS - Manual

Instruction Sheet
10511650
15JL13 C/P30500 REV7
NOTICE - Only licensed Remy International, Inc. product and component parts should be used, and the use of other parts or modifications not approved
by Remy International, Inc. will void all applicable warranties. The failure to carefully follow these Installation Instructions, set forth above, will void all
applicable warranties. DELCO REMY is a registered trademark of General Motors Corporation, licensed to Remy International, Inc. Pendleton, IN 46064.
©
2012 Remy International, Inc. All rights reserved 1
INSTALLING DELCO REMY HEAVY DUTY STARTING MOTORS (37MT, 40MT, 41MT, 42MT & 50MT)
WARNING!!! ALWAYS USE PROPER EYE PROTECTION WHEN PERFORMING ANY MECHANICAL REPAIRS TO A VEHICLE –
INCLUDING, BUT NOT LIMITED TO, ANY INSTALLATION AND OR REPAIRS TO THE DELCO REMY STARTING MOTORS.
FAILURE TO USE PROPER EYE PROTECTION CAN LEAD TO SERIOUS AND PERMANENT EYE DAMAGE.
Only perform the mechanical functions that you are properly qualified to perform. A professional installation specialist should handle
mechanical repairs that are beyond your technical capabilities.
DANGER!!! ALWAYS DISCONNECT BATTERY GROUND BEFORE REMOVING OR REPLACING CABLES AT THE STARTER.
FAILURE TO DISCONNECT THE BATTERY GROUND CABLE CAN LEAD TO SERIOUS INJURY.
NOTICE! FOLLOW ENGINE A ND/OR VEHICLE MANUFACTURER’S INSTRUCTIONS CAREFULLY WHEN REMOVING AND
INSTALLING THE STARTERS.
MOUNTING FLANGE HOLES AND BOLTS (Figures 1, 2 & 3, page 2)
 This starter may have either .53” (13.6 mm) or .66” (16.8 mm) diameter mounting flange holes. Both starters can be mounted
with 1/2” or metric equivalent mounting bolts. Hex Head Cap Screws (Grade 5) should be used.
NOTICE! If Hex Head Size is too small, use a hardened washer or special 12-Point Head Cap Screw (Grade 5).
 Do not use any lock washers, star washers or soft washers with the starter mounting bolts.
 If any shims and/or spacer washers were used with the old starter, between the starter and flywheel housings, they must be
reinstalled in exactly the same location with this starter.
DRIVE HOUSINGS WITH ROTATABLE POSITIONING (Figure 1, page 2)
 These starter types are provided with 12 or 24 positions for locating the solenoid, so that many models may be serviced with only a
few. This flexibility permits removing any interference of the solenoid upon installation. Repositioning can be accomplished by
removing the six (6) TORX nose housing bolts, rotating the switch housing and
reassembly. Torque bolts to 17.6-23.0 Nm (13-17 lb ft).
 After rotation of starters using 5/8” mounting bolts, the lever housing boss may interfere with the wrench used for tightening. If this is
a problem, use a special 12-Point Head Cap Screw (Grade 5).
 Solenoid must be mounted in an upward position for housing to drain. A few models have solenoids and drains inverted.
 A heat resistant shield must be used if the solenoid is within two inches of the exhaust manifold.
INTEGRATED MAGNETIC SWITCH (IMS) REPOSITIONING (Figure 3, page 2)
 Remove the two IMS mounting screws and loosen fasteners that attach the IMS leads to the solenoid, if necessary.
 Reposition IMS by using a different set of solenoid mounting screws and/or set of bracket holes to obtain clearance.
 Reinstall mounting screws and torque all fasteners according to values labeled in figure 3, page 2.
GROUNDING INSULATED STARTING MOTORS (Figures 2 & 3, page 2)
This may be an insulated starter replacing a grounded type starter. Insulated starters have a flexible cable connecting the solenoid
ground terminal to terminal on the commutator end of the starter (labeled Insulated/Ground). An insulated starter must have a cable
connecting this terminal to the battery ground (-) connection for the starter to function. This grounding cable between the starter and
battery should be a copper cable the same size as the positive (+) battery cable being used.
ELECTRICAL CONNECTIONS (Figures 2 & 3, page 2)
 Identify and tag all leads when removing old starter so they can be properly connected on the new starter. Be sure to connect the
cables to correct solenoid terminals, because the terminals may be reversed.
 Clean or wire brush all terminals so that bare metal is exposed for good electrical connections.
 The connector for starters with optional Over Crank Protection (OCP) is the same for all series of starters.
 Tighten all fasteners according to torque values labeled on the illustrations.
RING GEAR
 If the ring gear is damaged, it must be replaced to avoid a potential early failure and risk rejection of a warranty claim.
BATTERY COLD CRANKING AMPERES (CCA)
Excessive available CCA can damage starters. CCA rating is the current a battery can supply at ‘0’ degree F (-18C) [See TMC RP
109A]. Following are Maximum Battery CCA Recommendations for Delco Remy Starters by Series:
37MT 12V 1875 CCA 40MT 12V 2500 CCA 41MT 12V 1875 CCA 42MT 12V 2500 CCA 50MT 12V 3600 CCA
24V 900 CCA 24V 1250 CCA 24V 900 CCA 24V 1250 CCA 24V 1800 CCA
*An Over Crank Protection (OCP) motor should be used whenever these CCA recomendations are exceeded.
FIGURE 1