Toro 3000D manual Hydraulic Hoses, Hydraulic Fitting Installation, Ring Face Seal

Hydraulic Hoses

Hydraulic hoses are subject to extreme conditions such as, pressure differentials during operation and exposure to weather, sun, chemicals, very warm storage condi­ tions or mishandling during operation or maintenance. These conditions can cause damage or premature dete­ rioration. Some hoses are more susceptible to these conditions than others. Inspect the hoses frequently for signs of deterioration or damage.

When replacing a hydraulic hose, be sure that the hose is straight (not twisted) before tightening the fittings. This can be done by observing the imprint on the hose. Use two wrenches; one to hold the hose straight and one to tighten the hose swivel nut onto the fitting.

WARNING

Before disconnecting or performing any work on hydraulic system, all pressure in system must be relieved by stopping the engine and lowering or supporting the box and/or other attachment.

Keep body and hands away from pin hole leaks or nozzles that eject hydraulic fluid un- der high pressure. Use paper or cardboard, not hands, to search for leaks. Hydraulic fluid escaping under pressure can have sufficient force to penetrate the skin and do serious damage. If fluid is injected into the skin, it must be surgically removed within a few hours by a doctor familiar with this type of in- jury or gangrene may result.

Hydraulic Fitting Installation

O–Ring Face Seal

1.Make sure both threads and sealing surfaces are free of burrs, nicks, scratches, or any foreign material.

2.Make sure the O–ring is installed and properly seated in the groove. It is recommended that the O–ring be re­ placed any time the connection is opened.

3.Lubricate the O–ring with a light coating of oil.

4.Put the tube and nut squarely into position on the face seal end of the fitting and tighten the nut until finger tight.

5.Mark the nut and fitting body. Hold the body with a wrench. Use another wrench to tighten the nut to the cor­ rect flats from finger tight (F.F.F.T.). The markings on the nut and fitting body will verify that the connection has been tightened.

Size			F.F.F.T.
4	(1/4 in. nominal hose or tubing)		.75	+ .25
6	(3/8 in.)		.75	+ .25
8	(1/2 in.)		.75	+ .25
10		(5/8 in.)	1.00	+ .25
12		(3/4 in.)	.75	+ .25
16		(1 in.)	.75	+ .25

Nut	Body
Sleeve
	Seal

Figure 2

Final

Position

	Mark Nut
	and Body
	Extend Line	Initial
		Position
Finger Tight	After Proper Tightening

Figure 3

Hydraulic System Page 5 – 4 Groundsmaster 3000/3000–D