SECTION II PREPARATION FOR USE - TM-10-3990-203-13-P0009

TM 10-3990-203-13&P

SECTION II

PREPARATION FOR USE

and tighten it by hand. Using a 7/16 inch box wrench,

2. UNATTACHED PARTS

tighten the plug securely.

2.1 Special, minor assemblies shall be completed

NOTE

before the ramp is considered completely assembled

and ready for use. The parts for these assemblies

Hydraulic fluid level should be at the bottom

are shipped in the attached parts box (para. 1.5.1).

of plug opening. Fluid should be added with

Table 2-1 lists the parts in the box.

the ramp in the lower position using hydrau-

lic fluid, Military Specification MIL-H-5606C,

2.2 SHIPPING PLUG

NSN-9150-00-252-6383.

2.2.1 To maintain proper oil level in the hydraulic

2.3 SAFETY CHAIN ASSEMBLY

system during shipping, a temporary shipping plug

2.3.1 There are two safety chain assemblies (Table

has been inserted at the top of the hydraulic pump

2-1), one for each side of the service end of the ramp

reservoir (Fig. 2-1). This plug shall be removed

(Fig. 2-2). The chains have hooks on one end and

and replaced with a breather plug (Table 2-l).

are attached to mounting plates with shackles on the

opposite ends (Fig. 2-3).

2.2.2 To change the plug, approach the pump through

the pump access port on the left side of the ramp

2.3.2 Take one safety chain assembly from the

(Fig. l-l). Using a 7/16 inch box wrench, loosen

special parts box (Table 2-1). The chains shall be

and remove the shipping plug (Fig. 2-1).

attached to the ramp by bolting the mounting plate to

NOTE

the frame bracket (Fig. 2.-3).

2.3.3 Line up the holes in the mounting plate with

Store the shipping plug, do not discard it.

the holes in the frame bracket. The chain shall be

Reshipment of the ramp will require changing

the plug again.

towards the service end of the ramp. From the out-

side of the mounting plate insert a 1/2-13 x 1 1/4 hex

head capscrew (Table 2-1) through the top hole (Fig.

2-3). From the backside of the frame bracket, thread

one of the 1/2-13 locknuts onto the end of the cap-

Do not overtighten the breather plug causing

screw and tighten by hand. Repeat the fastening

procedure for the bottom hole. Using a 3/4 inch

the threads to strip.

box wrench on the locknuts and a 3/4 inch socket

2.2.3 Take the breather plug from the special parts

and ratchet, tighten the fasteners securely. Attach

box (Table 2-l). Insert the breather plug into the

the second safety chain assembly to the opposite side

threaded hole where the shipping plug was removed

of the ramp by repeating the entire procedure.

Table 2-1. Parts Box - Contents

PART NUMBER

NOMENCLATURE

QUANTITY

Safety Chain Assembly Consisting Of:

310804

Eye Grab Hook

83026

1 per Assy

1/4" Connecting Link

83027

1 per Assy

1/4" x 8' Chain

83030

1 per Assy

1/4" Shackle with Pin

83029

1 per Assy

Mounting Plate

310806

1 per Assy

Mounting Bolts

80048

2 per Assy

80606

Hex Locknuts

2 per Assy

Breather Plug - Hydraulic Pump

55550

Manual

310999

2-1