Wyco 995, User Manual

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2 Pull the eccentric rotor assembly out of the housing
OTEE:
N
If the bearings are stuck and you have difficulty
removing them from the housing, screw the end
cap partly back into the housing and bounce the
head and cap down on a block of wood in order to
loosen the bearings from their seat, then pull out
the rotor assembly See Figure 16
Figure 16: Bearing Removal
OTEE:
N
The hexagon driver has left hand threads
3 Flush the rotor assembly and housing with solvent and
wipe all parts clean
4 Replace bearings, seals and hex driver Maintain
concentric alignment of the hex driver with respect to
the rotor shaft
5 Refill with proper amount of Wyco non-foaming vibrator
oil See Table 2
6 Apply Loctite 545 adhesive/sealant or equivalent to
threads on both ends of rotor
Head Model Head Size in. (mm) Oil Required
750-D
13/16 (20 64) Square 1/2 oz (14 g)
750-EH 1 (25 4) Square 3/4 oz (21 g)
750-FI 1-3/8 (34 93) Square 1 oz (28 g)
750-GI
1-3/4 (44 45) Square 1-1/4 oz (35 g)
750-LI
2 (50 8) Square 2 oz (57 g)
750-MI
2-1/4 (57 15) Square 3-1/2 oz (99 g)
750-SBI
2-1/2 (63 5) Round 1-1/4 oz (35 g)
Table 2: Head oil requirements
7 Replace the rotor assembly into the head housing
8 Apply Loctite 545 adhesive/sealant or equivalent all
around the threads of the end cap
9 Tighten and wipe off excess Loctite 545 adhesive/sealant
Flexible Shaft Lubrication and Break-in
When vibrators are shipped completely assembled from the
factory, the shafts are lubricated and broken-in If separate
cores and casings are shipped, they require the following
lubrication and break-in procedure Core and casing
combinations should be checked for lubricant levels at least
every 50 hours
Lubrication Procedure
To lubricate, lightly coat the core with grease (Wyco shaft
lubricant) while inserting it into the casing
MPORTANT I
Do not over lubricate. Surplus lubricant may get past the seal
in the vibrator head. Over lubrication will also increase the
amount of torque required to operate the vibrator, resulting
in additional stress on the motor and possibly early core and
casing failure.
When adding lubricant on the job, after each 50 hours
of operation:
1 Loosen the casing from the motor
2 Pull out the core about 15…18 in (318… 457 2 mm)
3 Apply lubricant as above to the exposed section of core
4 Reinstall the core, making sure that it engages with the
vibrator head During operation, the grease will travel the
full length of the casing
Break-in Procedure
A break-in procedure is required after the assembly of
separately shipped core and casing To break it in, repeatedly
coil the flex shaft from the head to the motor while the
motor is running The coiling and uncoiling should be
repeated at least three times for proper break-in
OTEE:
N
For shorter core and casing combinations, coiling
is not possible Break-in for short core and casings
requires bending into a U-shape instead of a coil
Water is one of the greatest enemies of satisfactory
performance of vibrator heads As the head is submerged in
the mix, water and cement can infiltrate into the head unless
precautions are taken In addition to securely tightening the
head onto the flexible shaft, the threads on the head and
shaft must be coated with Permatex Form-A-Gasket
No 2 This must be done each and every time that the head
is removed and reinstalled
Electric Vibrator Head Service and Maintenance
Page 15 February 2020 VBR-UM-02653-EN-05