Piper Navajo PA-31 Service Manual page 25

PIPER NAVAJO SERVICE MANUAL
TABLE II-I. LEADING PARTICULARS AND PRINCIPAL DIMENSIONS (cont.)
MODEL PA-31 (Series)
ENGINE (cont.)
Spark Plug Gap Setting
Firing Order
Starter, Prestolite, 24-Volt
Alternator, Delco-Remy, 28-Volt. 50 Amp
Voltage Regulator, Delco-Remy
Relay, Delco-Remy
Alternator, Prestolite, 28-Volt. 70 Amp
Voltage Regulator, Prestolite
Overvoltage Relay, Prestolite
Fuel Pump. Lear-Seigler
Fuel Pump, Titan
PROPELLER
.015 to .018
1-4-5-2-3-6, 1-6-3-2-5-4
MHB-4001 MHB-4007
MHB-4009
1100718
9000591
1115832
ALU8403 or ALU8421
ALU8403LS or ALU8421LS
VSF7403
X-17620
RG17980-D. RG17980-J RG9080-J4
RG-9080-J7
Lyc. No. 76846-1
Lyc. No. 76846-2
2 Blades
Manufacturer
Type
Hub
Blade
Diameter
Diameter, Minimum
Blade Angle, Low Pitch
Blade Angle, High Pitch
Governor Control
Governor Model
Hartzell
Constant Speed Feathering
HC-E2YK-2B HC-E2YK-2BT
HC-E2YR-2B
HC-E2YR-2BT
C8475-4 C8475A-4
80 in.
78 in.
14.5 ±0.1 12.5 0.1
81°
±
1.0
°
Hartzell
See Note 20
(1) PA-31-300 ONLY
(2) PA-31 TURBO ONLY
(3) PA-31-325 ONLY
(4) PA-31-325 LTIO-540-F28D ONLY
(5) PA.31-325 TIO-540-F28D ONLY
(6) USED AS AN ALTERNATE ON TIO-540-A2C AND LTIO-F2BD ENGINES
(7) USED AS AN ALTERNATE ON TIO-540-F2BD ENGINES
(9) ELIGIBLE ON TIC-540-A1A. A18 ENGINES ONLY
(10) ELIGIBLE ON TIO-540-A1A. A1B A2A. A2B ENGINES ONLY
(14) ELIGIBLE ON ALL TIO-540 SERIES ENGINES WITHOUT THE SUFFIX LETTER "A" IN THE
ENGINE SERIAL NUMBER AND WITHOUT HARTZELL PROPELLER SYNCHROPHASER
(18) ELIGIBLE ON 10-540-M1AS ENGINE ONLY
(20) REFER TO PARTS CATALOG FOR APPROPRIATE SERIAL NOS AND GOVERNOR PART NOS
(22) ELIGIBLE ON TIO-540-A1A. A1B A2A. A2B
Revised: 1/29/82
HANDLING AND SERVICING
1B1