PS Magazine - TB 43-PS-668
PS, The Preventative Maintenance Monthly
ISSUE 668
JULY 2008
14
PS 668
JULY 08
15
PS 668
JULY 08
I
n the past, the PLS truck has had problems with sticking magnetic relays. The
solution for a stuck relay has been to bang on the doghouse. But now there’s a new
relay that should prevent sticking—getting you out of the doghouse and putting an
end to the banging.
Order the new snap action contact type PLS relay kit using NSN 5975-01-552-
0667. This kit allows units to retroFt older trucks. Plus, it brings all required parts
(relays, wire, solderless connectors and shrink tubing) and installation instructions.
The instructions include procedures to help you remove the existing magnetic
switches and wire, rewire new relays, and mount new relays.
The PLS relay kit installation instructions are on AKO, so go ahead and eyeball
them before you order the kit. You can Fnd them by searching for PLS relay kit
installation instructions on the AKO website:
O
perators, there’s one more “pull to go” on the dump truck’s air system before you
call it a day.
That is, drain the air tank for the truck’s tailgate and material control system (MCS).
It’s seldom drained because it’s in the back of the vehicle under the tailgate’s cover.
But when the temperature drops, condensation gets into the air lines and solenoid-
controlled air cylinders.
That condensation during operation causes the tailgate to become sluggish or lock
up. Dumping operations come to a halt because the tailgate won’t open or close.
So pull the air tank pull-cable to let any water out. Release the pull-cable when all
the water and air have drained. This procedure is Step 16 of the operator’s PMCS in
TM 5-3805-264-14&P.
PLS…
M917A1 Dump Truck…
new production pls trucks
come with the new snap
action contact type relays
already installed.
New Relay
Gets You
Out
of the
Doghouse
One
pull…
…lets out all
the water
…
Not
Done
Yet!
don’t they
realize…
they
can’t
leave!?
they’re
{sob}…
c’mon
,
let’s call
it a day!
668.14-15.indd
1-2
5/26/08
5:09:49 PM
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