JLG G5-18A Service Manual page 33

c. Straight Thread Types, Port Connections
ORB - O-ring boss per SAE J1926, ISO 11926
MPP - Metric pipe parallel o-ring boss per SAE J2244,
ISO 6149, DIN 3852
MFF - Metric flat face port per ISO 9974-1
BSPP - British standard parallel pipe per ISO 1179-1,
DIN 3852-2
G5-18A, 2505
MAE9070
MAE9080
General Information and Specifications
d. Flange Connection Types
FL61 - Code 61 flange per SAE J518, ISO 6162
FL62 - Code 62 flange per SAE J518, ISO 6162
e. Tightening Methods
Torque - Application of a twisting force to the applicable
connection by use of a precise measurement instrument
(i.e. torque wrench).
Finger Tight (Hand Tight) - The point where the connector
will no longer thread onto the mating part when tightened
by hand or fingers. Finger Tight is relative to user strength
and will have some variance. The average torque applied by
this method is 4 Nm (3 ft-lbs).
TFFT - Turns From Finger Tight; Application of a preload to a
connection by first tightening the connection by
hand (fingers) and applying an additional rotation counted
by a defined number of turns by use of a tool.
FFWR (Flat method) - Flats From Wrench Resistance;
Application of a preload to a connection by tightening to
the point of initial wrench resistance and turning the nut a
described number of flats. A flat is one side of the hexagonal
tube nut and equates to 1/6 of a turn.
f. Assembly and Torque Specifications
Prior to selecting the appropriate torque from the tables
within this section, it is necessary to properly identify the
connector being installed.
g. General Tube Type Fitting Assembly Instructions
1. Take precautions to ensure that fittings and mating
components are not damaged during storage, handling
or assembly. Nicks and scratches in sealing surfaces can
create a path for leaks which could lead to component
contamination and/or failure.
2. When making a connection to tubing, compression or
flare, inspect the tube in the area of the fitting
attachment to ensure that the tube has not been
damaged.
MAE9090
2-21