Repair Guide; Precautions On Maintenance, Inspection And Repair; Inspection Criteria For Each Section And Consumable Parts - Hitachi CS 51EAP Service Manual
Engine chain saw
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Also See for CS 51EAP:
- Handling instructions manual (112 pages) ,
- Safety instructions and instruction manual (64 pages) ,
- Handling instructions manual (52 pages)
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This section describes repair, focusing on portions requiring frequent repair. See TROUBLESHOOTING
GUIDE in the previous section as the context for the following descriptions.
1. Precautions on maintenance, inspection and repair
• The fuel used readily ignites; therefore, never bring the product near a flame.
• Use new gaskets at reassembly.
• Prior to disassembly for repair, remove the fuel and chain oil into separate containers, and allow the engine
to cool down.
• During repair, startup or running, use adequate care for portions posing the risk of burn injury or electric
shock, such as hot areas including the muffler, high voltage cord, and spark plug.
• Before running the product with the guide bar and saw chain attached, make sure that there are no other
people nearby.
• Ensure proper ventilation when performing repair in a small room or other poorly ventilated space.
2. Inspection criteria for each section and consumable parts
Item
Idling revolutions
No-load maximum revolutions
(with guide bar and saw chain)
Clutch engagement
Accelerating performance
Gap between magneto rotor and
ignition coil ass'y
Spark plug
Gap between spark plug electrodes
Saw chain type
Saw chain pitch x gauge
No. of saw chain drive links
REPAIR GUIDE
Model
CS 51EAP
8.26 mm (0.325 in.) x 1.27 mm (0.05 in.)
-3-
-1
3,000 ± 200 min
(rev./min.)
-1
13,500 min
(rev./min.)
-1
3,900 to 4,600 min
(rev./min.)
Smooth acceleration
0.2 to 0.4 mm
NGK BPM7A or NGK BPMR7A
0.6 to 0.7 mm
OREGON 95VPX, 20BPX
56, 64, 66, 72, 78
CS 51EA
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