MBW Blitzscreed - Manual (Page 24)

22
BEARING REPLACEMENT
(Mechanical Screed)
1. Remove A-frame (Refer to section on
A-FRAME REPLACEMENT).
2. Knock out or press out old bearing out
of A-frame.
3. Press new bearing into A-frame.
4. Install A-frame into screed (refer to A-
FRAME REPLACEMENT).
DRIVE BELT REPLACEMENT
(Mechanical Screed)
GENERAL
There should always be two drive belts on the screed. One for driving and one for emerĆ
gency replacement. It is assumed the engine kit is installed on the left side of screed for this
procedure.
1. Remove left coupling driver. Support
end of shaft when driving spiral pin out.
2. Loosen set screws in left most A-frame
bearing.
3. Remove the two bolts from the top tube
at left end of screed and remove clevis.
4. Remove blind nut from bottom screw in
left A-frame and back screw out so it
clears edging surface.
5. Remove whiz-lock screw holding the
other leg of A-frame to edging and
slide A-frame off shaft.
6. Slip on a new drive belt over clutch and
drive pulley. Secure, using tie wraps,
an extra drive belt to an A-frame next
to drive pulley. Make sure extra drive
belt is threaded over top tube and unĆ
der shaft. For HD Dual belt system, SeĆ
cure two belts to A-frame and use two
on clutch.
7. Assemble A-frame, clevis and couĆ
pling driver removed earlier. The ecĆ
centric bearing offsets have to all be oriĆ
entated in the same direction. Make
sure offset of coupling driver
matches offset of eccentric bearings
when installed (thick side of couĆ
pling driver matches orientation of
thick side of eccentric bearing). ReĆ
member to support shaft when instalĆ
ling coupling driver. Tighten associatĆ
ed hardware and bearing set screws.
8. Loosen engine deck mounting bolts.
Adjust drive belt so it can be pinched
together to touch with finger pressure
(refer to Figure 19 page 14). For HD
drive, Belts should be tightend so that
their is a 2" gap when squeezed togethĆ
er. Tighten engine deck mounting bolts
keeping engine level.
GREASING BEARINGS
(Mechanical Screed)
Bearings come prelubed from the factory and do not need to be greased for their initial use.
Bearings need to be greased after screed has been washed down after a days usage and
for long storage. It is recommended to use a low temperature grease. Refer to sections on
OPERATION and LONG STORAGE in this manual for additional information. Only one
shot of grease is needed for each bearing. Over greasing will result in excess drag on the
shaft.