Gardner Denver GAF P Series, Руководство по эксплуатации и обслуживанию

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SB-7-622 Page 22
SECTION 6
DISASSEMBLY INSTRUCTIONS
NOTICE
Numbers in parentheses ( ) refer to key numbers in assembly drawings on pages 35, 37and 39.
1. Drain oil from gear case by removing drain plug (4).
2. Remove the socket head bolts (5) from the gear cover (3).
3. Remove the gear cover from the gear headplate.
NOTICE
The cover and gear headplate gasket tends to bond tightly to both surfaces. After socket head
bolt removal, it is sometimes necessary to take a ball peen hammer and a blunt chisel and drive off
the cover.
IMPORTANT:
MARK ALL PARTS WITH A CENTER PUNCH SO THEY CAN BE REASSEMBLED IN THE SAMEPOSITION
(IMPELLERS, HEADPLATES, AND GEARS).
4. If the timing gears appear undamaged, the gear backlash must be checked to see if the gears can be
salvaged.
A. Mount a magnetic base dial indicator on the gear headplate (see FIGURE 6-1).
B. Lock one impeller stationary by wedging a feeler gauge between the impeller and the headplate.
C. The tip of the indicator should be placed at the center of the contact surface on a tooth of the gear on the
free shaft.
D. Rock the impeller back and forth by hand and read the total rotational movement to the nearest .0005
inches. Do this at four gear mesh positions 90 degrees apart.
E. Permissible gear backlash is shown below.
GEAR DIA. GEAR BACKLASH
6
”
.002 - .003
7
”
.003 - .005
8
”
.003 - .006
FIGURE 6- 1
FIGURE 6- 2