Hydraulic Hose Repair

MAINTENANCE OF FORKLIFTS - OD1660 - LESSON 1/TASK 1

required. All high pressure hoses are constructed with a wire braid.

Hose size, in sixteenths of an inch, is indicated by a dash on the

hose or fittings.

For example, a -12 on the hose or fittings

indicates 12/16 or 3/4 of an inch.

(2) Hydraulic Hose Repair.

(a) To repair a damaged hydraulic hose (figure 11 on the

following page), place the hose securely in a vise, with the damaged

and extending past the vise jaws (view A). With a hacksaw, cut and

remove the damaged portion of the hose.

(b) Cut the hose around its circumference, the length of the

fitting, down to the wire braid (view B). Do not cut the wire braid.

(c) With the hacksaw, cut the hose diagonally from the end of

the hose (view C). Strip the hose down to the top of the wire braid,

using a pair of pliers.

(d) Place the fitting into the vise securely.

Screw the hose

into the fitting up to the shoulder (view D).

(e) Reposition the hose and the fitting in the vise so that the

end is up (view E).

Lubricate the end of the connection with

hydraulic oil. Place the small tapered end of the connector into the

opening of the hose and fitting. Screw it into the hose until it is

tight against the fitting (view F).

(f) This repair operation can be accomplished with process

tools and equipment located on the Tool Outfit, Hydraulic Systems

Test and Repair Trailer or as stated in TM 9-4940-468-14.

(3) Positioning of Hoses.

Ensure that the hoses on the tilt

cylinder, extension cylinder, and lift cylinder, are positioned in

such a manner that the hose will not chafe or be cut during the

operation of the unit.

7.

a.

General. The brake assembly on the rough terrain forklift is of the

hydraulically operated, 360 segmented, shoe type, actuated by an expander

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