PS Magazine - TB 43-PS-631

PS, The Preventative Maintenance Monthly

ISSUE 631

JUNE 2005
PS Magazine - TB 43-PS-631 - Page 11 of 33
PS 631
JUN 05
19
2
1
⁄
2
-Ton Trucks…
S
ome deuce-and-a-halfs are still using
the old hydraulic fluid-operated brake
light switch.
That’s not good.
The switch can blow an electrical
connector pin, dumping all your
hydraulic fluid. That means no brakes!
Replace the old switch with an air-
operated switch, NSN 5930-00-789-
6192. TM 9-2320-361-20 shows the new
system. To install the switch, you need
a conversion kit, NSN 2530-01-105-
5025.
The kit brings the switch, installation
instructions, mounting hardware and a
1
⁄
2
-in elbow. Some trucks need a
3
⁄
8
-in
elbow, NSN 4730-00-289-0155, so
measure the tubing to find out which
elbow you need.
PS 631
JUN 05
18
SECM…
Your Latest
TM
Changes Right Here
Fig B-18
Item 16:
relay, electromagnetic;
NSN 5945-01-438-7443; PN EA325NHHD
Item 24:
conduit, outlet;
NSN 5975-01-432-4124; PN 11B254101
Item 25:
cover, electrical, GFI;
NSN 5925-01-231-5423; PN GF5352-IC
Item 26:
cover, outlet;
NSN 5975-01-452-7053; PN WP26
Fig B-8
Item 13:
cabinet, storage, back, modified;
NSN 5140-01-386-1408; PN TRX4113
Fig B-12
Item 11:
pulley, crankshaft;
NSN 3020-01-188-3884; PN 612-6
Fig B-15
Item 10:
hose end, male;
NSN 4730-01-446-9975; PN 11B256021
Item 11:
ferrule, hose;
NSN 4730-01-435-9946; PN 11B256020
Fig B-16
Item 60:
cover, junction box
(previously called "load center");
NSN 5975-01-507-1855; PN 11B254103
Item 169:
DC/AC power inverter (UOC AQ6)
(previously called "AC/DC power inverter");
NSN 6130-01-492-3067; PN DU
I
-24/6000HEPHQ
Fig B-17
Item 5:
screw, tapping;
NSN 5305-01-432-9158; PN 15-065410-100
Ditch
Old
Switch
NEW
OLD
These
changes will
be made in the
next revision
to TM 9-4940-
563-13&P.
Grab a
pencil, SECM
repairmen.
The NSNs and part numbers
for the SECM (shop equipment,
contact maintenance) have
changed for some of the
items in TM 9-4940-563-13&P.
hey, ben, if our
hydraulic fluid
is leaking all
over the road…
…does
that mean
we have n—
631.18-19(C)
4/25/05
2:27 PM
Page 1
Click here for a copy of this article to save or email
Click here for a copy of this article
to save or email
Back to Top
Back to Top