TM 5-3820-256-10
(4)
Keep the rig as clean as possible at all times. Pay particular attention to hydraulic cylinder rods and other
exposed moving parts.
(5)
To the extent possible, erect barriers to protect against blowing sand or dust.
d. High humidity conditions.
(1)
Protect cylinder shafts and painted or polished surfaces by keeping them well lubricated or coated with a
thin layer of grease or similar preservative.
(2)
Check for and remove any rust and corrosion as it appears and repaint affected surfaces.
(3)
Keep pressure grease points well lubricated to prevent entry of moisture.
2-21.
Rig Tender Crane.
a. Cold Weather Operation.
(1)
Change oil and lubricate equipment with lubricants recommended for cold weather operation. Refer to
lubrication instructions in Chapter 3 for recommended lubricants.
CAUTION
Use caution during entire warmup procedure. Run the truck engine at the slowest possible speed and
actuate all controls slowly.
CAUTION
The hydraulic oil provides lubrication to the hydraulic pump. When the oil in the suction line and
reservoir is too cold and stiff to flow easily, it cannot keep the pump inlet supplies with oil, thus cavitation
occurs. If this condition continues for more than a few moments, serious damage will result.
(2)
To prevent cavitation, "jog" the PTO/hydraulic pump on and off by depressing and releasing the clutch until
oil has warmed enough to permit adequate flow to the pump.
(3)
If jogging the pump for 10 minutes does not produce acceptable results, do not attempt to operate the unit
until the vehicle can be taken inside a heated enclosure and serviced for cold weather operation. Refer to
the lubrication instructions in Chapter 3.
b. Hot Weather Operation.
(1)
Use lubricants that are more viscous and resist breakdown at high tempera
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