F
OR
M
ODELS
: JGI, JGM, JGN, JGP
AND
JGQ
S
ECTION
1 - D
ESIGN
S
PECIFICATIONS
& D
ATA
PAGE 1-16
required, use very sparingly as excessive amounts will result in oil analysis indication con-
tamination and unnecessarily increase maintenance costs.
For latest available torque values, see ER-63 at
www.arielcorp.com
.
T
ABLE
1-12 F
ASTENER
T
IGHTENING
V
ALUES
FASTENER
NOMINAL
SIZE,
INCH - TPI
TYPE
TORQUE,
LB-FT (N·m)
Main Bearing Cap - Cap Screw
1/2 - 13
12 Point - Grade 8
58 (79)
JGI Bearing Carrier to Frame - Cap
Screw
1/2 - 13
12 Point - Grade 8
44 (60)
Connecting Rod Cap - Cap Screw
1/2 - 13
12 Point - Grade 8/
Socket Head
58 (79)
1/2 - 20
67 (91)
Crosshead Pin Through Bolt
3/8 - 24
Hex - Lock Nut
25 (34)
Frame to Cylinder - Cap Screw
1/2 - 13
12 Point - Grade 8
48 (65)
Crosshead Guide to Support - Cap
Screw
5/8 - 11
Hex - Grade 8 or 9
90 (120)
Eccentric Vernier Cap - Cap Screw
5/16 - 18
Hex - Grade 8
Hand-wrench Tight
Idler Sprocket Through Bolt -
Lock Nut
1/2 - 20
Hex - Lock Nut
41 (55)
Rod Packing - Cap Screw
1/2 - 13
12 Point - Grade 8
35 (48)
Piston Nut
a
7/8 - 12
Ariel Design
222 (300)
Crosshead-Balance Nut
1 - 12
Ariel Design
Slugged
b
Piston Rod Oil Slinger - Lock Nut
1/4 - 28
lock Nut
96 lb-in. (11)
Rupture Disk - Blow-Out Fitting Cap 1/4 Nom. Tube Hex - Tube Fitting
40 lb-in. (4.4)
Hold Down - Stud-Nut
5/8 - 11
Hex Stud-Nut
100
c
(130)
3/4 - 10
175
3
(235)
Valve Cap;
Cylinder Head;
Gas Passage Cap;
Unloader;
Ariel Supplied Companion Flanges
- Cap Screw
3/8 - 16
Hex - Grade 8 or 9
or
12Point - Grade
B7M or 8
193 lb-in. (22)
7/16 - 14
26 (35)
1/2 - 13
40 (54)
9/16 - 12
57 (77)
5/8 -11
79 (105)
5/8 - 18
92 (125)
3/4 - 10
140 (190)
3/4 - 16
160 (215)
7/8 - 9
230 (310)
7/8 -14
260 (350)
1 - 8
345 (465)
1 - 16
395 (535)
