JLG 530LRT, Service And Maintenance Manual, Page: 120 / 262

SECTION 4 - BASIC HYDRAULIC INFORMATION & SCHEMATICS
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Assembly Instructions for American Standard Pipe
Thread Tapered (NPTF) Connections.
1. Inspect components to ensure male and female port
threads are free of rust, splits, dirt, foreign matter, or
burrs.
2. Apply a suitable thread sealant, such as Loctite 567, to
the male pipe threads if not already applied. Ensure the
first 1 to 2 threads are uncovered to prevent system con-
tamination.
3. Assemble connection hand tight.
4. Mark fittings, male and female.
OVER TIGHTENING MAY CAUSE DEFORMATION OF THE PIPE FITTING AND
DAMAGE TO THE JOINING FITTING, FLANGE OR COMPONENT MAY OCCUR.
NEVER BACK OFF (LOOSEN) PIPE THREADED CONNECTORS TO ACHIEVE ALIGN-
MENT. MEET THE MINIMUM REQUIRED TURNS AND USE THE LAST TURN FOR
ALIGNMENT.
5. Rotate male fitting the number of turns per Table 4-1,
NPTF Pipe Thread. See FFWR and TFFT Methods for TFFT
procedure requirements.
NOTE: TFFT values provided in Table 4-1, NPTF Pipe Thread are
applicable for the following material configurations:
• STEEL fittings with STEEL mating components
• STEEL fittings with ALUMINUM or BRASS mating compo-
nents
• ALUMINUM or BRASS fittings with STEEL mating compo-
nents
• ALUMINUM or BRASS fittings with ALUMINUM or BRASS
mating components.
Table 4-1. NPTF Pipe Thread
TYPE/FITTING IDENTIFICATION
Turns From Finger
Tight (TFFT)**
Material Dash Size
Thread Size ØA*
(UNF) (in) (mm)
STEEL, AL
UMINUM, OR
BRASS
FIT
TINGS WITH
STEEL, AL
UMINUM, OR BRASS
MA
TI
N
G C
OMP
ONENT
S
2 1/8 - 27 0.40 10.24 2 to 3
4 1/4 - 18 0.54 13.61 2 to 3
6 3/8 - 18 0.67 17.05 2 to 3
8 1/2 - 14 0.84 21.22 2 to 3
12 3/4 - 14 1.05 26.56 2 to 3
16 1 - 11 1/2 1.31 33.22 1.5 to 2.5
20 1 1/4 - 11 1/2 1.65 41.98 1.5 to 2.5
24 1 1/2 - 11 1/2 1.89 48.05 1.5 to 2.5
32 2 - 11 1/2 2.37 60.09 1.5 to 2.5
* ØA thread dimension for reference only.
** See FFWR and TFFT Methods subsection for TFFT procedure requirements.