Piper SARATOGA PA-32-301 Maintenance Manual page 100

TUBE OD
(IN.)
PIPER AIRCRAFT
PA-32-301/301T
MAINTENANCE MANUAL
SUPPORT CLAMPS.
Support clamps are used to secure the various lines to the airframe or powerplant assemblies. Several
types of support clamps are used for this purpose. The rubber cushioned and plain are the most commonls
used clamps. The rubber cushioned clamp is used to secure lines subject to vibration: the cushioning prevents
chafing of the tubing. The plain clamp is used to secure lines in areas not subject to vibration.
A teflon cushioned clamp is used in areas where the deteriorating effect of Skydrol 500. hydraulic fluid
(MIL-0-5606) or fuel is expected, however, because it is less resilient, it does not provide as good a
vibration-damping effect as other cushion materials.
Use bonded clamps to secure hydraulic, fuel and oil lines in place. Unbonded clamps should be used only
for securing wiring. Remove any paint or anodizing from the portion of the tube at the bonding clamp
location. Make certain that clamps are of the correct size. Clamps or supporting clips smaller that the outside
diameter of the hose may restrict the flow of fluid through the hose.
All plumbing lines must be secured at specified intervals. The maximum distance between supports for
rigid fluid tubing is shown if Figure 20-6.
CHART 2001. HOSE CLAMP TIGHTENING (INTIAL INSTALLATION)
Types
of Hose
Clamps
All Other Types
Worm Screw Type
Self-Sealing
All Other Hose
Finger-tight plus
two complete turns.
Finger-tight plus
one and one quarter
complete turns.
Finger-tight plus
two and one half
complete turns.
Finger-tight plus
two complete turns.
If clamps do not seal at specified tightening, examine hose connection and replace parts
as necessary.
DISTANCE BETWEEN SUPPORTS (IN )
ALUMINUM ALLOY
STEEL
1 8
3 16
4
5 16
38
1 2
58
3,4
9-1/2
12
13-1/2
15
16-1/2
19
22
24
26-1/2
1-11 2
14
16
18
20
23
25-1 2
27-1 2
30
Figure 20-6. Maximum Distance Between Supports for Fluid Tubing
20-07-00
Page 20-07
Revised: August 11, 1983
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