Concrete Vibrator, Backpack Model WBP50
Page 10
March 2014
9 . Inspect the gear teeth and verify they are not worn .
Check the bearings to verify they are functional—turning
smoothly and freely . If either is worn, replace them both .
MPORTANT
I
If EITHER the gear teeth OR the bearings are worn, replace
them BOTH at the same time with Wyco part numbers
W402615 and W402620.
10 . Clean the internal surfaces of the gear increaser
housings, including the O-ring groove (Wyco part
numbers W402601, W402602, W402610 and W401612)
before reassembly .
11 . Press the
output gear assembly
into place and install
the
snap ring
(Wyco part number W402125) in place to
prevent it from backing out .
12 . Insert the
input gear assembly
into the cavity in the
speed
increaser housing
. You may need to use a 5/16" hex driver
to rotate the output shaft to align the gear before the
input gear assembly
drops into the correct position .
13 . Install a new
O-ring
(Wyco part number W402627) into
the groove around the bearing adapter .
14 . Position the
bearing adapter plate
(Wyco part number
W402610) into the mating groove so it contacts the
bearing adapter
(Wyco part number W402602) .
15 . Align the
motor mounting bracket
(Wyco part number
W402612) so the 4 holes for the #10-24 bolts align with
the threaded blind holes on the
speed increaser housing
(Wyco part number W402601) .
16 . Apply Loctite 242 (or equivalent thread locker) onto the
threads of four #10-24x2 .25L SHCS . Place the screws into
the clearance holes on the
motor mounting bracket
(Wyco
part number W402612) and torque to 25 in-lb .
17 . Align the
clutch drum
(Wyco part number W402187) with
the mating threads on the
input gear
(Wyco part number
W402614) and apply 40 ft-lb of torque to tighten .
18 . Put 2 ounces of
gear oil
(Wyco part number W402151)
into the
gear increaser housing
through the 1/4-
28 bolt hole on the housing, opposite the motor
mounting bracket .
19 . Install the 1/4"
nylon washer
(Wyco part number
W401253) and the 1/4-28x0 .25
button cap screw
(Wyco
part number W402152) and torque to 50 in-lb .
20 . Align the motor bracket geometry with that on the
Honda GXH50 engine . Apply Loctite 242 or equivalent
onto the bolt threads and slide four
1/4" lock washers
(Wyco part number W402117) onto the bolts . Insert four
1/4-28x3 .00 long
alloy steel bolts
(Wyco part number
W402629) into the clearance holes, and torque to 10 ft-lb .
Honda Engine GXH50
Follow the recommendations in the Honda engine Owner’s
Manual for their GXH50 engine regarding, but not limited to,
the spark plug and air filter service .
SERVICING THE ENGINE
The Importance of Maintenance
Good maintenance is essential for safe, economical and
trouble-free operation . It also helps reduce pollution .
IMPROPER MAINTENANCE, OR FAILURE TO CORRECT
A PROBLEM BEFORE OPERATION, CAN CAUSE A
MALFUNCTION IN WHICH YOU CAN BE SERIOUSLY HURT
OR KILLED.
ALWAYS FOLLOW THE INSPECTION AND MAINTENANCE
RECOMMENDATIONS AND SCHEDULES IN THIS MANUAL.
To help you properly care for your engine, the following
pages include a maintenance schedule, routine inspection
procedures, and simple maintenance procedures using
basic hand tools . Other service tasks that are more difficult,
or require special tools, are best handled by professionals
and are normally performed by a Honda technician or other
qualified mechanic .
The maintenance schedule applies to normal operating
conditions . If you operate your engine under severe
conditions, such as sustained high-load or high-temperature
operation, or use in unusually wet or dusty conditions,
consult your servicing dealer for recommendations
applicable to your individual needs and use .
Maintenance, replacement, or repair of the emission control
devices and systems may be performed by any engine repair
establishment or individual, using parts that are ‘‘certified’’ to
EPA standards .
Maintenance Safety
Some of the most important safety precautions follow .
However, we cannot warn you of every conceivable hazard
that can arise in performing maintenance . Only you can
decide whether or not you should perform a given task .
Good maintenance is essential for safe, economical and
trouble-free operation . It also helps reduce pollution .
FAILURE TO PROPERLY FOLLOW MAINTENANCE
INSTRUCTIONS AND PRECAUTIONS CAN CAUSE YOU TO
BE SERIOUSLY HURT OR KILLED. ALWAYS FOLLOW THE
PROCEDURES AND PRECAUTIONS IN THIS MANUAL.
Safety Precautions
• Make sure the engine is off before you begin any
maintenance or repairs . This will eliminate several
potential hazards:
