Gardner Denver 4500 Series, Список запасных частей и руководство по эксплуатации и обслуживанию

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SB--7--626 Page 16
SECTION 6
REPAIR & REPLACEMENT
FIGURE 13 -- TIMING GEAR ASSEMBLY FIGURE 14 -- TIMING GEAR REMOVAL
A
B
With proper maintenance and lubrication, normal life of
bearings, gears and seals can be expected. To main-
tain the efficiency of your unit, however, these parts
must be repaired or replaced when required.
TIMING GEAR REMOVAL
Remove the gear case (see “Gear Inspection,” page
14. Match mark the shafts and gears to assure proper
repositioning on completion of work.
Refer to FIGURE 13 and FIGURE 14. Remove the
cap screws and gear locking clamps (A) from both
shafts. Inside the hub of each gear are two pairs of
telescoping grip rings (B) which secure the gear to the
shaft. These grip rings must be released to remove the
gear.
This is done by withdrawing the gear (FIGURE 14)
about 1/8 inch (3 mm) with a gear puller, then lightly
tapping the side of the gear. This releases the rings and
allows the gear to be removed by hand.
Note carefully the placement of the grip rings before
removal, so that you can replace them properly paired
and faced in the correct direction.
Reassembly
To reassemble, locate each gear firmly against the
bearing race on its shaft. Thoroughly clean and dry all
components -- the grip rings, shafts and gear bores;
coat the grip rings with a light oil, then slide the grip
rings all the way onto the bores. Be sure the rings are
paired and faced identically as originally installed, as
shown in FIGURE 13. (Note: do not reuse grip rings
which have been disassembled, since they lose
concentricity and locking characteristics.)
Replace the gear locking clamps and cap screws.
Establish a position for one gear, and progressively
tighten the cap screws on that gear only. Using a
torque wrench, finish at 45 ft. lb. (6.22 Kg--m). Shock--
load the gear locking clamp and then retorque to 45 ft.
lb. (6.22 Kg--m). Then follow “Resetting Impeller Clear-
ance,” page 15, before tightening the second gear in
the same manner.
Note the end clearance between the impeller and gear
headplate and correct, if necessary, according to
instructions in “End Clearance,” page 15. Replace the
gear case gasket and lubricate.