Specifications
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3-4 Fastener Torque Speci cations
Most fasteners and threaded components listed
should be coated with Never-Seez® or equiva-
lent prior to assembly. Certain fasteners or
components require the application of Loctite®
before installation. It is important to rst refer-
ence the corresponding assembly drawing to
obtain such information.
All tapered pipe thread connections be sealed
and locked using Loctite 569™ hydraulic seal-
ant. Use of Loctite cleaning solvents activators
7471™ or 7649™ should be used on inactive
metals and to speed curing process.
Fastener Torque Speci cations
Fastener Size (in) Typical Installation Required Torque (ft-lbs)
1/4 - 20 NC
Tong door switch assembly bolts, tong door guard support
strip, tong jaw clip bolts
14
1/4 - 20 Set Screws
Encoder coupling
2
, jaw spring clip
2
N/A
3/8 - 16 Set Screws
Bearing caps
1
, door switch adjustment sleeve
4
N/A
3/8 - 16 NC
Housing cover, brake bands, backup side plates, tong &
backup clip bolts
38
1/2 - 13 NC
Top secondary bearing cap, cage plate bolts, locking pin,
ring gear key, motor mounts, backup halo, leg bolts
93
5/8 - 11 NC
Tong plates, bearing caps, idler shaft bolts, cam follower
nuts, backup cylinder gland bolts, hanger bolts
180
5/8 - 18 NF
Cam follower
55
3/4 - 10 NC
Cage plate spacer bolts, jaw adapter bolts, backup bolts,
rigid bail bolts
317
7/8 - 14 NF
Cam follower
512
1 - 8 NC
UHT backup backing bolt
100
1 - 12 NF
Dumbell roller
3
, tong door jam nut
N/A
1 - 14 NC
Idler shaft
100
1 1/4 - 12 NF
Backup bulkhead connector
100
1 1/2 - 12 NF
Idler shaft
1200
1
Coat with removable Loctite®. Tighten until screw contacts bearing, then back off (1) turn.
2
Tighten until snug.
3
Tighten until all slack is removed but dumbell roller is free to rotate by hand.
4
Coat with removable Loctite®. Tighten until snug.
3-4.1 Fastener Torque
Speci cations
WARNING
Use of inferior fasteners or failing to meet the
torques speci ed on this page may lead to
equipment malfunction that exposes nearby
personnel to signi cant hazards.
NOTICE
Replacement fasteners are to be GRADE 8
or better.
NOTICE
The use of Te on tape or Te on based thread
sealing compounds on hydraulic system
connections is not advised, as they can
cause system contamination.
Fluids, Lubrication, & Torque 3-2 Fastener Torque Specications
3-2.1 Fastener Torque
Specications