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MULTI-BATTERY ISOLATOR APPLICATION INSTALLATION MANUAL

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PLEASE READ INSTRUCTIONS COMPLETELY PRIOR TO STARTING INSTALLATION 4 3 2 1 GROUP GROUP GROUP GROUP General Motors (Delcotron/Delphi) Except Delcotron/Delphi CS series alternators (CS series used on most 1985 and newer GM vehicles). Ford Up to 1998 Chrysler All models, all years including Nippondenso externally regulated alternators. Jeep Equipped with Nippondenso externally regulated alternators Japanese Imports With alternators using external voltage regulator or external sensing. Motorola Load Handler Series or 8EM Remote Sense Series General Motors (Delcotron/Delphi) Equipped with Delcotron/Delphi CS series (most 1985 – 1993) or CS130-D series alternators (most 1993 and newer***) Jeep Vehicles equipped with Delcotron/Delphi CS series alternator (most 1985-1990). Toyota, Honda & Some Imports 1985 and newer equipped with Nippondenso alternator with internal regulators or alternators with an “S” (sense) terminal. Motorola Other than Load Handler Series Bosch Requiring regulator sensing A Group 3 Isolator will have a colored fourth terminal indicating the “R” terminal. Unplugging the plug-in connector from the alternator and counting the number of holes in the connector can identify the CS series alternator. The CS series will have three small and one large hole. The CS130-D alternator has four pin terminals all the same size. The SI series will have two slotted holes in the connector. ***Delco/Delphi CS series alternators require a separate sense wire which is included with the connector kit. The connector kit may or may not be included with the Isolator, but is available as an accessory. All Group 2 Isolators may be used in Group 1 applications. Simply disregard the additional excitation (“E”) terminal. A Group 2 Isolator will have a colored fourth terminal indicating the “E” terminal. Battery Isolators are not compatible with these alternators. A Battery Separator is recommended for these applications. Alternators with internal voltage sensing, e. g. some Mitsubishi and Hitachi , or single wire self exciting Delco/Delphi alternators. Isolators may be used if the alternator is modified. For further information on Group 4 Isolation Technolgy contact Sure Power Industries.

1985 Toyota 4Runner Alternator Upgrade Project Installation

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the first and most important thing to do when you receive your replacement alternator, assuming it’s not a direct replacement, is to make up a simple measuring jig for it. This is nothing more than a 1′ or 1 ½” angle with 2 holes drilled to simultaneously hold both alternators by the rear of the lower (i.e. longer) mounting tab. See Figure 3 for the one I built in about 1 minute. This fixture allowed me to line up the pulleys, and then measure the difference between the back of the lower mounting tab and the front of the tab, giving me the new measurement for the lower mounting bracket Figure 3. Measurement fixture; OEM alternator in the rear, Powermaster PWM-47294 alternator in front. Pulleys are lined up; note how easy it is to measure the distance from measurement fixture (the 1 ½” angle) to the front of the lower mounting tabs of both alternators. The difference in this distance is the measurement that the lower mounting bracket needs to be lengthened. Note the use of the 8 washers to move the Powermaster alternator forward. Note from Figure 2 that the OEM lower mounting tab is slightly longer than the Powermaster 47294 (2.285″ vs. 2″). From the measurements taken from the fixture, I then cut the lower mounting bracket and rewelded it, making it approximately ¾” longer. For strength, I added a ¼” x 1″ x 2.5″ long steel flat bar to the side of the bracket. See Figure 4 for a picture of the lower mounting bracket as modified and installed. When I rewelded the lower bracket, I made it approximately one 3/8″ washer (~.085″) longer than I thought I needed. As it turned out, this was fortuitous since when tightening the lower bracket, it pulls the front tab and therefore the alternator and its pulley, to the rear by a very slight amount. This added length was just enough to keep the alternator pulley lined up with the crankshaft pulley