JLG 1850SJ Service And Maintenance Manual page 272

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Table of Contents

SECTION 5 - BASIC HYDRAULIC INFORMATION & HYDRAULIC SCHEMATICS

Assembly Instructions for O-Ring Boss (ORB)

1. Inspect components to ensure that male and female

port threads are free of rust, splits, dirt, foreign matter, or

2. Ensure proper O-ring is installed. If O-ring is missing

install per O-ring Installation (Replacement).

CARE TO BE TAKEN WHEN LUBRICATING O-RING. AVOID ADDING OIL TO

THE THREADED CONNECTION OF THE FITTING. THE LUBRICATION WOULD

CAUSE INCREASED CLAMPING FORCE AND CAUSE FITTING DAMAGE.

3. Pre-lubricate the O-ring with Hydraulic Oil.

4. For Non-Adjustable and Plugs, thread the fitting by

hand until contact.

5. For Adjustable fittings, refer to Adjustable Stud End

Assembly for proper assembly.

6. Torque the fitting or nut to value listed in Table 5-12 thru

Table 5-17 while using the Double Wrench Method.

a. The table headings identify the straight thread O-

ring port and the type on the other side of the fit-

ting. The torque will be applied to the straight

thread O-ring port.

b. Torque values provided in Table 5-12 thru Table 5-17

are segregated based on the material configuration

of the connection. 'ALUMINUM/BRASS FITTINGS OR

ALUMINUM/BRASS MATING COMPONENTS' indi-

cate either the following material configurations:

• STEEL fittings with ALUMINUM or BRASS mating compo-

• ALUMINUM or BRASS fittings with STEEL mating compo-

• ALUMINUM or BRASS fittings with ALUMINUM or BRASS

mating components.

7. Inspect to ensure the O-ring is not pinched and the

washer is seated flat on the counter bore of the port.

Troubleshooting