Troubleshooting - Makita UC3020A Technical Information

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[3] DISASSEMBLY/ASSEMBLY
[3] -1. Lubricating Mechanism (cont.)
TROUBLE SHOOTING
If the oil is not supplied to chain or delivered very little;
1) Remove Guide bar, then Push nut and Filter. (Fig. 7) Run the machine without Filter.
If the oil flows out from Oil supply port, there is not trouble with Oil pump complete.
The malfunction is caused by clogged Filter in this case. Clean up Filter with kerosene.
2) If the oil does not flow out, remove Housing (R) (Fig. 2 on page 2) and disassemble Lubricating mechanism
(Fig. 3 on page 3), and check whether the following parts are clogged with foreign matter:
Filter in Oil tank, Oil tube, Oil pump complete
If clogged, remove foreign matter and clean up the part(s) with kerosene.
Reassemble Lubricating mechanism and Housing (R) to Housing (L), then Filter and Push nut to Housing (R).
Run the machine, then check whether the oil flows out.
3) If the oil does not flow out, the malfunction is caused by broken Oil pump complete.
Replace Oil pump complete with new one.
Fig. 7
Housing (R)
Oil supply port
Filter
Push nut
Important:
Removed Push nut can be reused.
However, replace with new one
if any one of the teeth is broken
or badly deformed.
P 4 /10