Hydraulic System Maintenance - Sullair 600H User Manual

600H, 700HH, 750, 750H, 750HH, 825, 900H, 1050 USER MANUAL
A
XLE BEARING ADJUSTMENT
The correct end-play adjustment for the bearings is
0.001" to 0.010". Refer to Figure 5-4.
1. Remove the dust cover on the hub assembly.
Disengage the tang washer holding the outer
locking nut. Then remove the nut and tang
washer.
2. Rotate the hub assembly slowly while tight-
ening the inner locknut to 100 ft-lb. to seat
the bearings.
3. Loosen the inner lock nut to remove the pre-
load torque. DO NOT ROTATE THE HUB!
4. Finger tighten the inner lock nut and snug.
5. Back out the inner lock nut 1/4 to 3/8 of a
turn.
6. Install the tang washer and outer lock nut.
Bend two tangs over the inner lock nut.
Torque the outer lock nut to 150 ft-lbs., insur-
ing the inner lock nut does not turn. Bend
two tangs over the flats on the outer lock nut
to secure.
7. Install the dust cover and refill the hub
assembly with new oil.
M F F S
AIN LUID ILTER
Refer to Figure 5-2. The main fluid filters are located
schematically in the lubricant line between the
receiver tank and the compressor unit. The main filter
elements are replaceable. For installation of the filter
elements, follow the procedure explained below:
1. The compressor MUST be shut off and sys-
tem pressure MUST be relieved.
2. Position a suitable container beneath the
elements to catch fluid drainage.
3. Remove elements using a suitable tool.
4. Rotate each element counterclockwise to
remove.
5. Remove element and discard. These ele-
ments are not cleanable.
6. Make certain that the mounting surfaces and
filter heads are clean.
7. Apply a light film of clean fluid to each ele-
ment gasket surface.
8. Center the new elements on filter housing
heads and tighten until the filter gaskets
make contact with the filter housing. After
gaskets make contact, tighten 1/2 to 2/3 of a
turn.
82
ERVICING
9. Run compressor and check for leaks.
*Repair kit for thermostat element,
part number 250026-561
**Replacement filter element (2 required),
part number 250025-526
5.16 HYDRAULIC SYSTEM
MAINTENANCE
Figure 5-5: Hydraulic Tank
1. Fill Cap
2. Sight Glass
3. Strainer
4. Level Switch
5. Temperature Switch
6. Drain Valve
F C P
LUID HANGE ROCEDURE
Refer to Figure 5-5. Warm-up the compressor for 5 to
10 minutes to warm the fluid. Shut the compressor
off and relieve all
proceeding. Drain the fluid by opening both the
appropriate drain valve located in the frame as well
as the valve on the bottom of the hydraulic reservoir,
refer to Figure 5-5. Remove filler cap during draining.
Close the valves when draining is complete. Fill the
reservoir with fluid according to Section 3.3:
Lubrication Guide—Compressor on page 65.
SECTION 5
internal pressure before