Piper Comanche PA-24 Service Manual page 647

PIPER COMANCHE SERVICE MANUAL
b. Inspect th. couplq
(Z).
Usc a n ... coupl;", if the olel one .ppean detmo ... teel.
<. Reaaembl. th. pump with a n ... motor pHet
(II)
IDe! I n ... moan if required. T¢ten the
motor nutS (14) just .nug. S. sur. the coupling (2) ........ both the pump .haft.nd the motor .h.ft.
d. Run the pump
It
free d.livery wirh rest fluid. Usc an ammeter ro m ..... re moror current. TIp
motor to position
it
so that current is a minimwn. Tilhten motor nuu to approximately l' in. Ibs. Test
pump u dcscribeel in pancnph 5: rho 24-hour run-in may
be
omitteel.
4. Shaft Seal Rcplao:cmcnL
L
RemOYe moror Inel associated pam u describccl in Section 3. RcmOYe cover .nel uso<iateel
parr. u dcscribccl in pancnph 2. Rcrno ... the eighr vanes
(6)
with care to Ivoiel elamaging them.
b. If I retaining ring is founel on the pump shaft,
remov.
rhis with suitabl. plicn .nd discard the
<inc. Push the roror uscmbly our of the pump. Remov. the hous;", insert (4). noring itS position. Using •
. 40
ro .41 diameter. f1ar f"eeI brass drift
""eI
arbor p ..... p ..... the shaft
seal
(12) our of rho housing
(3).
Usc care to Ivoiel damaging the bearing surfaces. Para may now be wuheel in • milcllOlvenL
<. Apply I thin uniform <oa<inc of "John Cran. Plasri< LncI Seal No.2" ro th. outsiel. diameter
of I new shaft seal (12). (This
seal
may be I cliffcrcnr rype than rho on. which wu in the pump.) With th.
<over enel of the hou.;", uscmbly on I .• , surfa<c.
usc
I 15/16 diameter f1ar fa .. d bras. drift in
an ..
bor
press ro p .... the shafr
seal
(12)
hom. in .h. hOUJing uacmbly
(3).
d. PI ... the i!lJCttlon rool (Figure
8-(7)
over th. end of therotor assemblv
(5).
Usc motor oil
to lubricate the end of the iiuert:ion tool Ind the shaft
seal. Push
and
twist
the
rOtor
assembly into the
housing uscmbly. Insull the housing insert (4). Insull the vanes
(6)
radius .nd away from .. nter. Insrall
rho <over and uso<iareel
putS
per paragraph 2. Remov. iNertion rool. then install the moror .nd uso<iated
pans per S.",.on 3. Run in IDe! tClt u described in paracn!'h 5.
5. Pmonnance Requirements For Motor Driven Fuel Pumps .
.. G.n.raL
1. Tesr fuel to b. odorless mincralspirits, 'P.ru.< graviry 76. viscosity 1.0
co
@
78° F.
2. Pump .hall b. mounrcd with the morOt horizontal.
3. Test stand to obrain a m""imum length of 3/8 1.0. tubing to minimize restriction to fuel
flow.
4. 14 volts D.C. of th. proper polarity shall be used throughout.
b.
RequirementS;
1.
Pump to be run for 24 houn
at
14 volts with rmncted outlet.
2. Run pump unol
ill air is removed. from the SYStem.
3. Rcstri« fuel flow <ompl«.lv.
Mociel
No.
Pressure Flow
~80 5 18-1 or 480 528 15 p.i ~51Ph m.n.
480533
20 psi 85 gph min.
4.
Check for leaJu.a:e
l [
seal. cover gasket a.nd through castin!,s.
S. Resmct flow
1.5
follows:
Mood So.
ShutoffPr .......
~80 518-1 or~80 528
25 psi max.
~80 Bl 4-0
pSI
max.
Amperes
S S ma.."<.
7.S max.
Amperes
6 S
max.
10. max.
6.
Observe for undue noise during all phases of calibration. Excessive noise shaH be cause for
rejccnon.
FUEl SYSTEM
ISSUED: 8/18/72
2Jll