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Trailer parts update: M989A1 HEMAT ...


Brake Parts

Some of the NSN's for the trailers air brake air brake: see brake.
air brake

Either of two kinds of braking systems. The first, used by trains, trucks, and buses, operates by a piston driven by compressed air from reservoirs connected to brake cylinders (see piston and cylinder).
 parts have changed. Make a note of these new numbers in Fig 13 of TM 9-2330-383-14&P.
Item     Part            NSN

 2     Chamber,    2530-01-301-3033
       air brake

 3      Clevis,
        rod end    5340-01-355-8612

 10    Chamber,
       air brake   2530-01-288-4052


M989 Helical helical /hel·i·cal/ (hel´i-k'l) spiral (1).

hel·i·cal
adj.
1. Of or having the shape of a helix; spiral.

2. Having a shape approximating that of a helix.
 Spring

NSN NSN National Stock Number
NSN Nokia Siemens Networks
NSN National Storytelling Network
NSN NATO Stock Number
NSN New Substances Notification (CEPA)
NSN National Student Number (NZ)
NSN Never Say Never
 5360-01-6448 gets the trailer's helical spring. The NSN shown as Item 2, Fig 4 of TM 9-2330-368-14&P w/change 1 is no longer available.

Radial Tires

Bias-ply tires are no longer available for the trailer. So if your trailer still has bias-ply tires, when one tire needs replacing, replace them all with radial tires. Radials last longer and help the prime mover prime mover: see energy, sources of.
Prime mover

The component of a power plant that transforms energy from the thermal or the pressure form to the mechanical form.
 get better mileage.

Get the 385/65R22.5, load range J, radial tire with NSN 2610-01-436-3332 or NSN 2610-01-452-0605.

Remember, bias-ply and radial tires do not mix. So replace all tires, including the spare, when you make the change.

The recommended pressure for the radial tires on the HEMAT HEMAT Heavy Expanded Mobility Tactical Truck
HEMAT Heavy Expanded Mobility Ammunition Trailer
 is 105 psi for all road surfaces.
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Copyright 2003, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

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Publication:PS, the Preventive Maintenance Monthly
Date:Oct 1, 2003
Words:169
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