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NOTE: These materials are for use by trained technicians who are experienced in the service and repair of outdoor power
equipment of the kind described in this publication, and are not intended for use by untrained or inexperienced individuals.
These materials are intended to provide supplemental information to assist the trained technician. Untrained or inexperienced
individuals should seek the assistance of an experienced and trained professional. Read, understand, and follow all instructions
and common sense when working on power equipment. This includes the contents of the product's Operators Manual, supplied
IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY
with the equipment. No liability can be accepted for any inaccuracies or omission in this publication, although care has been
This Service Manual is not a substitute for the Operator's Manual. You must read, understand
taken to make it as complete and accurate as possible at the time of publication. However, due to the variety of outdoor power
and follow all of the directions in this manual as well as the Operator's Manual before working
equipment and continuing product changes that occur over time, updates will be made to these instructions from time to time.
Therefore, it may be necessary to obtain the latest materials before servicing or repairing a product. The company reserves the
on this power equipment.
right to make changes at any time to this publication without prior notice and without incurring an obligation to make such
changes to previously published versions. Instructions, photographs and illustrations used in this publication are for reference
use only and may not depict actual model and component parts. © Copyright 2005 MTD Products Inc. All Rights Reserved
MCCULLOCH CORPORATION P.O. BOX 31567, TUCSON, AZ 85751-1567
MTD Products LLC - Product Training and Education Department
PRINTED IN USA
Service Manual
32cc String Trimmer
Power Head
FORM NO. 769-00942
(10/2003)
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Summary of Contents for McCulloch 32CC TRIMMER
- Page 1 Instructions, photographs and illustrations used in this publication are for reference use only and may not depict actual model and component parts. © Copyright 2005 MTD Products Inc. All Rights Reserved MCCULLOCH CORPORATION P.O. BOX 31567, TUCSON, AZ 85751-1567 MTD Products LLC - Product Training and Education Department PRINTED IN USA FORM NO.
- Page 3 See Figure 2.5. Figure 2.1 2.2. There is also a McCulloch version of the large tap-n-go head. It is used on the straight shaft trimmers, and rotates in the opposite direction of the small one.
- Page 4 McCulloch 32cc Trimmer 2.6. Align the arrows on the spool with the arrows on 2.8. From the eyelet, the line will be channeled up the housing. See Figure 2.6. under the bump knob by a set of ramps in the spool.
- Page 5 McCulloch 32cc Trimmer 2.13. If repair is required, remove the bump knob, and 2.17. The ratchet wedges can be serviced by remov- withdraw the spool. See Figure 2.13. ing the three screws holding the black cover to the top of the housing. See Figure 2.17.
- Page 6 McCulloch 32cc Trimmer 2.19. When properly installed, the wedges should be 3.3. To separate the powerhead from the boom, spring loaded. They retract when the ribs on the remove the screw at the top of the grip using a T- back of the spool pass them, then extend to 25 driver, then withdraw the boom.
- Page 7 McCulloch 32cc Trimmer 3.5. Disconnect the throttle cable from the carburetor 3.7. Remove the two screws from the trigger housing by unhooking the Z-fitting at the carburetor end cover using a T-15 driver. See Figure 3.7. of the cable. See Figure 3.5.
- Page 8 McCulloch 32cc Trimmer 3.10. The trigger housing can be pulled-free of the grip 3.12. The grip and clutch housing can be separated after the trigger and rear housing are removed. from the engine by removing the four screws See Figure 3.10.
- Page 9 McCulloch 32cc Trimmer 3.16. Remove the clutch drum using a T-25 driver. 3.18. The flat side of the clutch rotor seats against a See Figure 3.16. tube that surrounds the crankshaft. See Figure 3.18. Recoil rope used as a piston stop...
- Page 10 McCulloch 32cc Trimmer 3.21. Unplug the stop switch wires from the ignition 3.23. Alternatively, the throttle cable could be discon- module as the starter housing is removed from nected from the engine by squeezing the tabs, the engine. See Figure 3.21.
- Page 11 McCulloch 32cc Trimmer 3.30. As the starter is reassembled, apply a sparing amount of white lithium grease to the friction sur- NOTE: If the starter rope is not broken, it will be faces of the starter pulley. necessary to relieve tension from it before removing the starter pulley.
- Page 12 McCulloch 32cc Trimmer 3.34. Remove the spacer and tube from the crank- 3.39. If the pawls are damaged, they are available as shaft. a pair, with mounting hardware, in kit form. See Figure 3.39. 3.35. Remove the nut from the crankshaft using a deep 11/16”...
- Page 13 McCulloch 32cc Trimmer 3.43. Removing the starter housing will also allow 3.46. As the starter housing goes-on, connect the access to the ignition module. If the ignition short lengths of stop switch wire that are inside module is removed for any reason, the air-gap...
- Page 14 McCulloch 32cc Trimmer 3.49. Connect the stop switch wires in the clutch hous- EXHAUST ing to the male spade terminals on the ends of If the fuel/oil mixture is too rich, the exhaust port and the stop switch wires in the starter housing, and muffler may accumulate deposits of carbon.
- Page 15 McCulloch 32cc Trimmer 4.5. Remove the three screws that secure the engine 4.8. The muffler can be easily removed by unhooking cover, using a T-25 driver. See Figure 4.5. the spring and bale that retain it. See Figure 4.8. Round...
- Page 16 McCulloch 32cc Trimmer 4.12. Install the muffler using a new gasket. FUEL SYSTEM See Figure 4.12. Carburetor repair is beyond the scope of this manual, but service information is available from Walbro and Zama, the manufacturers whose carburetors are used on McCulloch products.
- Page 17 Figure 5.5 5.12. The fuel tank is locked into place between a pair of bosses on the crankcase plug and a pair of NOTE: All current McCulloch products, including bosses on the engine shroud. chainsaws, use the same primer bulb assembly.
- Page 18 McCulloch 32cc Trimmer...
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