P 2 / 7
R
epair
[2] LUBRICATION
1) Put 4g of Makita grease N.No.1 in Gear portion.
2) When replacing Oil pump, apply a little amount of Chain oil to Pin portion of Crank.
3) Apply a little amount of Makita grease N.No.1 to the circumference of Cam.
4) Apply a little amount of Makita grease N.No.1 to the gear used for toolless blade tension adjustment.
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Maintenance of Oil Supply Port
[1] NECESSARY REPAIRING TOOLS
CAUTION: Remove the chain blade, guide bar from the machine for safety before
repair/ maintenance ! Make sure that chain oil is removed from oil tank !
1R005
Retaining ring pliers RT-2N
Removing Compression spring 9
1R033
Bearing setting plate 10.2
Repairing Push nut
1R263
Bearing extractor (2 pcs)
Removing Bearing housing
1R269
Bearing extractor
Removing Bearings
Description
Code No.
Use for
Fig. 1
If Chain oil is not supplied to chain or delivered very little;
1) Remove Guide bar from the machine. Remove Push nut 8 from Oil supply port as illustrated in Fig. 1: the teeth of
Push nut 8 will be closed to some extent at this time. Remove Filter (of felt) from Oil supply port, and
run the machine. If Chain oil flows out from Oil supply port, there is not trouble with Oil pump.
The malfunction is caused by clogged Filter in this case. Clean up Filter with kerosene, and set Filter and Push nut 8
in place.
Note:
Removed Push nut 8 can be reused by respreading the closed teeth using hammer and 1R033. (Fig. 2)
Replace Push nut 8 with new one if any one of the teeth is broken or badly deformed.
2) If Chain oil does not flow out although Filter is cleaned up, disassemble Lubricating mechanism (See [3] -2 on page 3.),
and check whether the following parts are clogged with foreign matter: Filter in Oil tank, Oil tube, Oil pump.
If clogged, remove foreign matter and clean up the part(s) with kerosene. Run the machine, and check whether Chain
oil flows out.
3) If Chain oil still does not flow out, the malfunction is caused by broken Oil pump. Replace Oil pump complete with
new one.
Fig. 2
Push nut 8
Oil supply port
Push nut 8 can be removed by:
A) Levering up with a thin screwdriver, or
B) Lightly pushing in with a Phillips screwdriver.
A)
B)
1R033
Teeth are closed.
Teeth are spread.
Push nut 8
