Makita UC3520A Technical Information

P 4 /10
Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Lubricating Mechanism (cont.)
Fig. 7
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.
TROUBLE SHOOTING
Filter
Housing (R)
Important:
Removed Push nut can be reused.
However, replace with new one
if any one of the teeth is broken
or badly deformed.
Push nut
Oil supply port

Makita UC3520A Specifications

General

Power source	AC
Chain pitch	3/8 \
Chain speed	13.3 m/s
Product color	Black, Blue
Automatic oiling	Yes
Chain bar length	350 mm

Weight and Dimensions

Width	436 mm
Height	244 mm
Length	200 mm
Weight	3800 g