SkyTrak 6036 Service Manual - Manual (Page 14)

Section 2 General Instructions
2-3 Model 6036 S/N 9B0499 and Before
SAE
Size
Be sure that hydraulic oil is at operating tempera-
ture (80 to 120 °F) before adjusting relief valves,
pressure reducing valve or sequence valve. If
necessary, operate the machine to raise the oil
temperature. The oil temperature can be checked
by placing a hand against the side or the bottom of
the reservoir. If your hand feels too hot to keep
against the reservoir, the oil temperature is
acceptable.
2.7 TORQUES
2.7.1 Fasteners
All fasteners are plated and equal to SAE grade 5
(PC8.8) unless otherwise specified.
2.7.2 Bolts and Nuts
Unless otherwise specified the following grade 5
(PC8.8) torque values (±10%) apply:
Torque Torque
Inch lb-ft N m mm N m lb-ft
1/4 9 12 6.0 10 7
5/16 18 24 8.0 25 18
3/8 31 42 10.0 50 37
7/16 50 68 --- --- ---
1/2 75 105 12.0 80 59
9/16 110 150 14.0 130 95
5/8 150 200 16.0 200 146
3/4 250 340 20.0 360 263
7/8 380 515 22.0 510 372
1.0 585 790 24.0 650 475
2.7.3 Flared Fittings (37 o , steel)
1. Align tube and fitting
2. Tighten nut to the following torque:
Torque
lb-ft N m
4 8-12 11-16
6 19-23 26-31
8 38-46 52-63
10 50-58 68-79
12 84-92 114-125
14 100-108 136-147
16 117-129 159-175
20 176-200 239-271
24 251-283 340-384
2.5 BEARINGS
2.5.1 Removal
1. Bearings should never be removed unless
absolutely necessary. Always use the
recommended puller to reduce the risk of
bearing or related component damage.
2. When bearings or bushings are removed,
check that the bearing is free from dis-
coloration, nicks, scuffing, and signs of
overheating. If in doubt, replace the bearing
or bushing.
2.5.2 Cleaning
Bearings acceptable for service should be cleaned
in a suitable solvent and immersed in clean
lubricating oil until needed.
2.5.3 Installation
1. Be sure bearings are installed with care during
servicing, maintenance and repair.
2. Install bearings in either of the following two
ways:
• press fit on rotating parts such as shafts and
gears, and
• push fit into static locations such as reduc-
tion gear housings.
3. When possible, always install the bearing into
the rotating part first.
4. Use the proper tools or a press when installing
a bearing or bushing.
5. In the absence of the proper tools or press,
heat the bearings and/or casing in hot oil to
assist in the installation.
2.6 PRESSURE TESTING
AND ADJUSTMENT
Prior to pressure testing or adjustment, be sure all
hoses are in good condition and all fittings tight.
Use a pressure gauge with a range that is large
enough to measuring the specified pressure.
Comply with the correct procedure to prevent
damage to the system or the equipment and to
eliminate the possibility of injury.