Makita HM0860C Technical Information page 7

<8> Removing/Installing Fluoride Ring 28
Fluoride ring 28 can be removed from Impact bolt using slotted driver.
When installing Fluoride ring 28 on Impact bolt, use a Taper sleeve (1R214). (Fig. 13)
Fluoride Ring and Taper Sleeve
Use Taper sleeve for fitting fluoride ring to impact bolt of Rotary Hammers.
Once expanded, fluoride ring does not shrink to its initial size by itself. So, after you install fluoride ring
on the groove of impact bolt, insert the impact bolt into Taper sleeve to the full. And hold them on at least
for 15 seconds till the fluoride ring fits completely to the impact bolt.
Note: Do not reuse the fluoride ring removed from impact bolt. Always use fresh one for replacement.
Fig. 13
Note:
Do not fail to place
an O ring 23 under
Fluoride ring 28.
Impact bolt
<9> Removing /Installing Oil Seal 15
<9>-1. Removing Oil Seal 15
As illustrated in Fig. 14, push Oil seal 15 out of Crank housing complete using following tools;
Bearing extractor (1R225), arbor press, *washer of proper size, **Bearing setting plate
* The ram diameter of the Bearing extractor is too small to push the oil seal. So a washer of proper size is
necessary as an auxiliary tool.
** Any one of the six Bearing setting plates can be used.
Fig. 14
Fit a washer onto Oil seal 15, and
push it using Bearing extractor
and arbor press.
Bearing extractor
(1R225)
Washer of
proper size
Oil Seal 15
<9>-2. Installing Oil Seal 15
Oil seal 15 can be press-fitted into Crank housing complete using arbor press and washer as follows;
(1) Put Crank housing complete on Bearing setting plate so that its motor side of Crank housing faces
the ram of arbor press.
(2) Carefully press-fit Oil seal 15 to Crank housing complete.
Caution: The groove of Oil seal 15 must face the side of Crank housing cover.
Insert Impact bolt
into Taper sleeve
from the end on
which "HR5001C"
is stamped.
Taper sleeve
table of arbor press
Wrong installation will result in damages to the machine.
If you find difficulty in pulling out Impact bolt after
installation of Fluoride ring 28, remove Impact bolt
by hitting a round bar inserted from the opposite end.
round bar
[cross section of Taper Sleeve]
120mm
ø30mm
HR5001C
Ram of arbor press
Bearing setting plate
P 7 /14
ø20mm ø45mm
HR4000C
Crank housing cover side of
Crank housing complete
Crank housing complete
Motor side of
Crank housing complete