Multiquip HHN34TVD - Manual (Page 39)

HHN34TVD RIDe-ON TROWeL • OpeRaTION maNuaL — ReV. #2 (01/10/11) — page 39
Maintenance
TROWeL aRm RemOVaL
1. Remove the hardware securing the stabilizer ring to
the trowel arm. (Figure 38)
Figure 38. Stabilizer Ring
2. Each trowel arm is held in place at the spider plate
by a hex head bolt (zerk grease fitting) and a roll pin.
Remove both the hex head bolt and the roll pin (Figure
39) from the spider plate.
3. Remove the trowel arm from the spider plate.
Figure 39. Remove Roll Pin and Zerk Fitting
4. Should the trowel arm inserts (bronze bushing) come
SPIDER
PLATE
ROLL
PIN
HEX HEAD
BOLT
(ZERK
FITTING)
out with the trowel arm, remove the bushing from the
trowel arm and set aside in a safe place. If the bushing
is retained inside the spider plate, carefully remove
the bushing.
5. Examine the bronze trowel arm bushing (Figure 37),
and clean if necessary. Replace bushing if out-of-
round or worn.
Figure 40. Bronze Bushings
6. Wire brush any build-up of concrete from all six sides
of the trowel arm. Repeat this for the remaining arms.
CHeCkINg TROWeL aRm STRaIgHTNeSS
Trowel arms can be damaged by rough handling, (such as
dropping the trowel on the pad), or by striking exposed
plumbing, forms, or rebar while in operation. A bent trowel
arm will not allow the trowel to operate in a smooth fluid
rotation. If bent trowel arms are suspect, check for flatness
as follows, refer to Figures 38 and 39:
Figure 41. Trowel Arm
1. Use a thick steel plate, granite slab or any surface
which is true and flat, to check all six sides of each
trowel arm for flatness.
2. Check each of the six sides of the trowel arm (hex
section). A feeler gauge of .004" (0.10 mm) should not
pass between the flat of the trowel arm and the test
surface along its length on the test surface. (Figure 42) .
BRONZE
BUSHING
Lever Mounting Slot
(Left Arm Shown)
Roll Pin Hole
Blade Attachment
Bolt Hole (1 of 3)
Flat of Hexagonal-Shaft
(Top of Arm)
Trowel Arm
Round Shaft Section
Trowel Arm
Hex-Shaft Section