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PAGE 32 — HPLA/HPHA-SERIES 46" WALK-BEHIND TROWEL— OPERATION AND PARTS MANUAL — REV. #6 (07/06/10)
Figure 41. Worn Spider Plate
Trowel Arm Adjustment Procedure
A
level
, clean area to test the trowel prior to and after is essential.
Any unlevel
spots
in the floor or debris under the trowel blades
will give an incorrect perception of adjustment. Ideally, a 5 x 5"
three-quarter inch thick
flat
steel plate should be used for testing.
1. To determine which blades need adjustment, place the
trowel in the test area (three-quarter inch thick plate) and look
for the following conditions:
■
Pitch the blades as flat as possible and look at the
adjustment bolts
. They should all barely make contact
with the
lower wear plate
on the spider. If you can see
that one of them is not making contact, some adjustment
will be necessary.
■
Is the machine wearing out blades unevenly (i.e. one
blade is completely worn out while the others look new)?
(Figure 41) below illustrates a "
worn spider bushings or bent
trowel arms
". Check to see that adjustment bolt is barely
touching (0.10" max. clearance) lower wear plate. All alignment
bolts should be spaced the same distance from the lower wear
plate.
(Figure 42) below illustrates the "
correct alignment
" for a spider
plate (as shipped from the factory).
Figure 42. Correct Spider Plate Alignment
At the front of the book (Page 7) there is a “
Daily Pre-Operation
Checklist
”. Make copies of this checklist and use it on a daily
basis.
MAINTENANCE SCHEDULE
Daily (8-10 Hours)
1. Check the oil level in the engine crankcase and gear box,
fill as necessary.
2. Check V-belt.
Weekly (50-60 Hours)
1. Relube arms, thrust collar and clutch.
2. Replace blades if necessary.
3. Check and clean or replace the engine air filter as
necessary.
4. Replace engine oil and filter as necessary, see engine
manual.
Monthly (200-300 Hours)
1. Remove, clean, reinstall and relube the arms and thrust
collar. Adjust the blade arms.
2. Remove, clean, reinstall clutch.
Yearly (2000-2500 Hours)
1. Check and replace if necessary the arm bushings, thrust
collar bushings and shaft seals.
2. Check pitch control cables for wear.
3. Adjust blade speed.
HPLA/HPHA-SERIES 46" TROWEL — MAINTENANCE (TROWEL)
NOTE
NOTE
See the engine manual supplied with
your machine for appropriate engine
maintenance schedule and
troubleshooting guide for problems.
The following procedure should be
followed to adjust trowel arms when
it becomes apparent that the trowel
is finishing poorly or in need of
routine maintenance.
ALWAYS allow the engine to
cool before servicing. NEVER
attempt any maintenance
work on a
hot!
engine.
CAUTION!CAUTION!
CAUTION!CAUTION!
CAUTION!