Service and Repair Manual
General
For best performance hammers should be serviced at regular intervals, any indication that the hammer is not performing as specifi ed should be
investigated to prevent any adverse damage occuring.
ALL SEALS, GASKETS, GREASE OR OTHER PARTS DEEMED NECESSARY FOR SERVICING ARE IN THE SERVICE KIT.
ALL NEEDLE ROLLER BEARINGS SHOULD BE PRESSED WITH THE ROUNDED EDGE ENTERING THE BORE FIRST, AND THE PRESS
TOOL PRESSING AGAINST THE FLAT SURFACE OF THE BEARING.
Cleaning
All mechanical parts with the exception of any sealed bearings should be cleaned in a suitable cleaning fl uid. Electrical parts should be cleaned
by the use of compressed air. PRECAUTIONS MUST BE TAKEN FOR PERSONAL SAFETY THE USE OF EYE PROTECTION AND GLOVES IS
RECOMMENDED.
Inspection
All mechanical and electric parts should be inspected for wear and replaced as required.
Model 840M
2
WARRANTY AND LIABILITY STATEMENT
Use only Authorized parts. Any damage or malfunction caused by the use of unauthorized parts is not
covered by Warranty or Product Liability.
SERVICE TOOLS
All repairs may be completed with standard workshop tools and equipment.
Service and Repair Manual
Model 840M
EXAMPLE:
00
Component Parts (Small #)
0
Are Included When Ordering
The Assembly (Large #).
%SEE PAGE 5 FOR
ADDITIONAL
LUBRICATION AND
SERVICE NOTES
3
FIG. PART NO. DESCRIPTION OF PART NO. REQ.
1 9170 4650 00 Ball Bearing (1)
4 9170 4672 80 Vent Kit (1)
8 9170 3253 10 Pivot Nut (1)
10 9170 3252 90 Pivot Bolt (1)
11 9170 4650 90 K50 x 8mm Pan Hd. Plastite Screw (1)
12 9170 4651 00 K35 x 8mm Pan Hd. Plastite Screw (1)
13 9170 4651 10 K60 x 20mm Pan Hd. Plastite Screw (2)
14 9170 4651 20 K60 x 40mm Pan Hd. Plastite Screw (2)
15 9170 4651 30 K50 x 30mm Pan Hd. PT-DG Screw (2)
16 9170 4651 40 K60 x 18mm Pan Hd. PT-DG Screw (2)
17 9170 4651 50 K60 x 120mm Pan Hd. PT-DG Screw (2)
22 9170 3253 90 Pan Hd. Cap Screw (2)
23 9170 4652 00 Slotted Plastite Torx Screw (2)
26 9170 3252 50 K50 x 18mm Pan Hd. Plastite Screw (4)
27 9170 4666 00 Thumbwheel (1)
28 9170 4665 90 Service Nameplate Kit (1)
29 9170 4652 90 Electronics Assembly (1)
30 9170 4653 40 Armature Kit (See Service Note) (1)
31 9170 4653 60 Field (1)
32 9170 4654 00 Brush Card Assembly (1)
33 9170 4654 10 Blade Housing Assembly (1)
34 9170 4668 30 Quik-Lok Cord Set (1)
35 9170 4654 50 Switch (1)
37 9170 4654 60 Crankcase Assembly (1)
42 9170 4655 00 Upper Handle Mount (1)
46 9170 4655 30 Module Cover (1)
47 9170 4655 40 Motor Cover (1)
50 9170 4655 70 Left Handle Half (1)
51 9170 4655 90 Right Handle Half (1)
52 9170 4656 10 Motor Housing (1)
53 9170 4656 30 Rear Shroud (1)
63 9170 4672 80 Vent Kit (1)
66 9170 4657 80 O-Ring (2)
86 9170 4673 20 Bearing Cup (1)
●
(See Note)
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. 9170 4673 00 into
the empty groove. The O-Ring is provided in the kit.
FIG. PART NO. DESCRIPTION OF PART NO. REQ.
92 9170 4653 80 Carbon Brush Kit (Includes 2 Brushes) (1)
93 9170 4666 10 Brush Spring (2)
94 9170 4660 80 Bellows (1)
95 9170 3254 30 Isolation Module Assembly (1)
96 9170 4654 90 Light Pipe (1)
100 9170 4661 40 Cushion Grip (1)
122 9170 3254 00 Rubber Washer (2)
123 9170 4662 80 Handle Seal (1)