User manual TECUMSEH AH-HSK600 QUICK REFERENCE

[. . . ] Tecumseh Quick Reference Service Information Covers Engine and Transmission Product Form No. 695933 R 7/00 Introduction This booklet contains the quick reference and basic troubleshooting information previously found on Tecumseh wall charts and in the Technician's Handbooks. This booklet is designed to be used as a work bench quick reference guide when servicing Tecumseh engines and motion drive systems. Technician's Note: Tecumseh engines are manufactured to meet EPA and CARB standards. As a technician, it is unlawful to re-calibrate or replace a fuel nozzle or jet (bowl nut) with a part from any other carburetor that was not originally designed for that engine. All speed adjustments must remain within the limits that are specified for each engine and are not to exceed the maximum. [. . . ] OUTPUT LEAD (RED) ELECTRIC STARTER LEAD (ORANGE) BATTERY GROUND (BLACK) BLACK RED 67 18 Watt A. C. Lighting Alternator Models H35, HS & HSSK 40-50, HM & HMSK 70-80100 CHECKING THE SYSTEM: To check the system, disconnect the plug from the rest of the lighting system. Connect a wire lead from the single pin connector coming out of the engine to one terminal of a No. Connect another wire to the remaining terminal of the bulb and run it to a good ground on the engine. If less than the minimum values, the alternator is defective. ENGINE YELLOW #4414 BULB 68 37 35 Watt A. C. Before making any exterior tests, check for an inoperative switch, shorted wires and burned out headlight and/or stop tail light. Check for defective lights, wiring or switches, if less than the above readings, the alternator is defective. OUTPUT LEADS ARE BLACK AND RED. A. C. YELLOW GREEN IGNITION STOP YELLOW 69 1 Amp (18 Watt) Add-on Alternator CHECKING THE SYSTEM: To check the system, disconnect the plug from the rest of the lighting system. Start the engine and test the circuit using a voltmeter as shown (diag. connector is defective. Yellow Yellow #4414 BULB 70 38 2. 5 Amp D. C. , 35 Watt Lighting If output is below standard listed, pull back protective coating in front of the diode and check A. C. POSITIVE OUTPUT LEAD (RED D. C. ) NOTE: These minimum numbers should be obtained by your meter and will often be higher. A. C. 71 2 and 3 Amp DC Alternator System - Diode in Harness Models: H30-35, HS40, H50-60, HH50-60, HM70-80-100, HMSK, HHM80, HSK, HSSK, Rotary Mower Engines This system has a diode included in the red wire which converts the alternating current (A. C. ) to direct current. The direct current (D. C. ) is used to provide a trickle charge for the battery. The leads from the alternator and the type of connector may vary, but the output readings will be the same. CHECKING THE SYSTEM: Remove the fuse (if equipped) from the fuse holder and check the fuse to make certain it is good. (Continued on Next Page) Green Red GROUND PROBE (+) 72 DIODE PROBE (+) Green Red 73 39 If less than the above readings, proceed in making an A. C. output check by pulling back the protective coating from the fuse holder and diode. voltmeter, check voltage from a point between the engine and the diode as shown in the diagram (diag. Alternator System - Rectifier Panel This 3 amp system is readily identified by the rectifier panel in the circuit. When replacing the diode in the rectifier panel, locate the undercut on one end of the diode and match it to the detent on terminal clip of the rectifier panel. output of the rectifier panel as follows: Disconnect the battery lead from the terminal of the rectifier panel. Connect negative lead to engine ground. Green - + 74 Minimum values should read: 2500 R. P. M. With the battery lead disconnected from rectifier panel, probe the A. C. VOLTMETER Yellow Yellow FUSE PROBE + TO ENGINE GROUND - 75 (Continued on Next Page) 40 Minimum values should read: 2500 R. P. M. [. . . ] To assist you in making repairs, we have developed the quick reference illustrations below. By looking at the direction and style of ribs between the inner and outer parts of the pulley, you can use this chart to obtain the correct parts. Please consult the regular parts list for a complete illustration or replacement. 4 7 6 4 3 5 2 1 NOTE: The pulleys are identical but the retaining system changes between these two. 3 2 1 1 2 3 4 5 6 7 590599A 590600 590696 590601 590697 590698 590699 Spring Pin (Incl. 4) Washer Retainer Washer Brake Spring Starter Dog Dog Spring TYPE I 1 2 3 4 590740 590616 590617 590760 TYPE II Retainer Starter Dog Dog Spring Locking Tab 8 7 7 6 4 3 5 2 1 5 2 1 6 4 3 7 7 6 2 5 3 4 1 6 1 2 3 4 5 6 7 590599A 590600 590679 590601 590678 590680 590412 Spring Pin (Incl. [. . . ]