maintenance instructions
Model MCS 300
page 13 of 16
®
JARVIS
6201010:.
PRODUCTS CORPORATION
33 ANDERSON ROAD, MIDDLETOWN, CONNECTICUT 06457--4926
UNITED STATES OF AMERICA E--MAIL.
jarvis.products.corp@snet.net
TEL. 860--347--7271 FAX. 860--347--6978 WWW. j
arvisproducts.com
For Tools with Roller Bearings on Crown Gear:
7.1.1 Make sure pinion gear and planetary hous-
ing assembly (items 24--44) are installed be-
fore making any backlash adjustments and
prior to installing crown gear assembly
(items 46--54).
7.1.2 Press one bearing cup (item 48) into gear
side of crown gear (item 49).
Press the
bearing cup in fully.
7.1.3 Press the remaining bearing cup (item 48)
into flat side of crown gear (item 49).
Press
the bearing cup in fully.
7.1.4 Make sure bevel end of retaining ring (item
52) is facing away from spur gear (item 50)
when installing onto crown gear (item 49).
See Figure 3.
7.1.5 Make sure shims (item 46) and bearing
spacer (item 53) are installed in exact loca-
tion and according to size noted in steps
6.13.1.1 and 6.15.1.1.
CROWN
GEAR
NOTE BEVEL
DIRECTION
SPUR GEAR
RETAINING
RING
Figure 3
7.1.6 If replacing tapered bearing cones and cups
(items 47 and 48), proper clearance between
them must be set with bearing spacer (item
53) and shims (item 46).
Note: Shim pack-
age (item 46) contains 5 shims 0.1 mm thick
and 5 shims 0.2 mm thick. Install only as
many shims as necessary to achieve proper
clearance. Refer to Figure 4 as a guide for
proper placement of shims and orientation
of bearing cones and cups.
7.1.7 Remove all grease from bearings to proper-
ly feel the clearance of the bearings.
7.1.8 Install the crown gear pin (item 54), bearing
cone (item 47), crown and spur gear assem-
bly (items 49--52), bearing spacer (item 53),
three thick shims (item 46) and other bear-
ing cone (item 47) into the spur gear housing
(item 18).
7.1.9 Tighten crown gear pin (item 54). Check
the clearance on the bearing cones (item
47).
The bearing cones should rotate freely
with no axial play. Decrease shim (item 46)
thickness until all axial play is eliminated,
while still allowing cones to rotate freely.
7.1.9.1 When assembled with crown gear hex
nut (item 21) tight, there should be a
slight resistance to the rotation of the
spur gear assembly on the spur gear pin
(item 14). A slight clearance between
the bearing cone and bearing cup is ac-
ceptable as long as the crown gear as-
sembly is stable with no side to side play
on the crown gear pin (item 54).
Refer
to Figure 4 as a guide.
7.1.9.2 If bearing cones are tight, increase shim
thickness until proper clearance is
achieved.
7.1.9.3 If bearing cones are loose, decrease
shim thickness until proper clearance is
achieved.
7.1.10 Remove the crown gear assembly (items
47--54).
7.1.11 Re--install the crown gear assembly (items
47--54) adding at least two shims (item 46)
between the spur gear housing (item 18) and
bearing cone (item 47). Make sure bearing
cones and bearing cups are installed correct-
ly.
7.1.12 Tighten crown gear pin (item 54).
7.1.13 Check the backlash between crown gear
(item 49) and pinion gear (item 43).
Rotate
the shaft of the pinion gear. The bevel gears
should not have too much backlash nor be
too tight.
The ideal backlash is
0.004--0.005”. Increase the shim (item 46)
thickness to increase the backlash; decrease
the shim thickness to reduce the backlash.
See Figure 4.
