Varec, Inc. 47
2. Vent all pressure from gauge head.
3. If the gauge is oil-filled, drain the oil.
Warning If the negator motor is broken, the broken pieces can cause injury. Whenever
the back cover of the gauge head is removed, stand away as the last bolt is removed. Wear
gloves and safety glasses.
4. Remove 16 back cover bolts
(38) and back cover (17) with any auxiliary equipment attached.
5. Attach the original installation crank
(59) provided with the gauge to the tape storage
sheave.
Warning The rapid action of the spring could result in the crank spinning and striking the
operator or damaging equipment. Use a firm grasp on the crank. Tighten thumbscrew
before releasing grip.
6. Remove the outboard sheave elbow cover.
7. Turn the installation crank clockwise to unwind the tape from the storage sheave.
Caution Be careful to insure that the tape does not kink and that it remains clean.
8. While unwinding the tape in the gauge head, withdraw the tape at the outboard sheave
elbow.
9. When all tape is removed from the storage sheave, turn the installation crank slowly
counter clockwise to wind the negator spring motor onto the motor storage sheave.
10. Detach the negator motor
(48) from the storage sheave by loosening the securing screw
(57).
11. Remove the negator motor
(48), bushings, washers, and shims.
12. Remove the storage sheave assembly
(8), bushings, washers, and shims.
Assembly
Perform the following steps to install the gauge head:
1. Install a Teflon washer if needed
(4), a shim washer (45) and the new storage sheave (51) over
the lower gauge head shaft
(10).
Note In the next step, the alignment of the sprocket sheave to the tape storage sheave
is critical for proper operation of the gauge.
2. Adjust the number of shims to bring the sheaves into the specified alignment as shown on
Figure 2.
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