Table 2-1. Operator's Daily Preventive Maintenance

TM 55-1730-208-13

WARNING

Clear area beneath aircraft of all

equipment and personnel before

lowering aircraft.

(1) Loosen retainer screw on ram lock nut

assembly and turn ram lock nut assembly to the top of

extension screw of ram assembly. Tighten retainer

screw.

(2) Open air vent assembly and slowly open

release assembly located on pump assembly until

desired lowering rate is obtained.

CAUTION

Lowering rate of the hydraulic

jack is controlled by the release

assembly.

Do not open the

release assembly too quickly.

(3) When ram assembly is completely

lowered, close vent and release assemblies.

(4) Turn extension screw in until it is lowered

inside the ram.

AV 010004

Figure 2-1. Hydraulic Jack Operation and Erection

2-8. Operational Inspections.

Diagram (Sheet 2 of 2).

Refer to table 2-1 for inspection criteria pertinent

to the hydraulic jack operator.

2-9. Servicing.

Refer to chapter 3, paragraph 3-6 for servicing

information.

Table 2-1. Operator's Daily Preventive Maintenance

BEFORE OPERATION PROCEDURES

Inspect hydraulic jack for condition of paint, corrosion, and bent braces.

Inspect all bolted connections for damage and security.

Inspect extension screw and ram for dirt and corrosion and ram lock nut assemble, free rotation. Clean and

lubricate as necessary.

Inspect hose for deterioration, kinks, and leaks.

Inspect pump piston for dirt, corrosion, and leaks.

Check hydraulic fluid level in reservoir.

Check ram operation.

DURING OPERATION PROCEDURES

Check for evidence of leaks at pump assembly, hose, and cylinder and ram assembly.

AFTER OPERATION PROCEDURES

Check hose for leaks. Tighten if necessary.

Check hydraulic fluid level in reservoir.

Clean hydraulic jack.

Record all deficiencies on DA Form 2404 and corrective action taken.

2-3