Use only Authorized parts. Any damage or malfunction caused by the use of unauthorized parts is not All repairs may be completed with standard workshop tools and equipment. Service and Repair Manual Model 840M covered by Warranty or Product Liability. SERVICE TOOLS...
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9170 4657 80 O-Ring ● 9170 4673 20 Bearing Cup Service and Repair Manual Model 840M NO. REQ. Armature Service Note: When servicing the armature, use Armature Kit No. 9170 4653 40. If the tool has a spacer in the armature bearing bore of the gearcase, remove the spacer and install O-Ring No.
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9170 4653 80 CARBON BRUSH SERVICE KIT THIS KIT CONTAINS: --------------- Carbon Brush Service and Repair Manual Model 840M NOTE: Do not wash clutch gear assembly (57). If needed, wipe off with a dry rag. Coat gearcase seal (62) with lubrication prior to placement in the gearcase (38).
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NOTE: Check the clutch torque. Clutch must slip at 40 to 50 ft.lbs. at the spindle, checked clockwise as viewed from the front of the tool. Service and Repair Manual Model 840M NO. REQ. Press Needle Bearing (7) in Connecting Rod (109)
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Service and Repair Manual Model 840M Press metal insert of fan to here. Press fan (3) onto armature (30) such that the metal insert of the fan bottoms against the fan journal shoulder of the armature shaft. After the armature assembly (30) is...
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Black Elect. Mod. ----- Black Elect. Mod. ----- Service and Repair Manual Model 840M Terminals, Connectors and 1 or 2 End Wire Preparation Component of blade housing assembly. Component of blade housing assembly. Component of electronics module. Strip 1/4" for T1.
4.5/6.5 Amps Measured on disassembly/assembly 40/50ft lbs 47/61Nm. (Non Electrical Test) Note: On all test readings + or -5% of fi gures shown is acceptable. Service and Repair Manual Model 840M 1500 Volts (min) 1200 Volts (min) 3000 Volts (min)
Ensure the unit is switched "ON" before testing. Operate the unit for approx. 10 minutes at half voltage for initial 'bedding in' of the carbon brushes followed by full operational voltage. Compare readings with Performance Data. With the aid of the Fault Finding chart (below) the source of any malfunction may be quickly identifi ed and repaired. Service and Repair Manual Model 840M FAULT FINDING...
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