CESSNA 172 SKYHAWK Series Workshop Manual 1969-1976
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Cessna
A Textron Company
Service Manual
1969 THRU 1976
MODEL 172
SKYHAWK SERIES
Member of GAMA
FAA APPROVAL HAS BEEN OBTAINED ON TECHNICAL
AFFECTS AIRPLANE TYPE DESIGN.
REVISION 4 TO THE BASIC MANUAL INCORPORATES
3 OCTOBER 1994, TEMPORARY REVISION 2 DATED 7
REVISION 3 DATED 7 OCTOBER 2002.
Copyright © 2004
Cessna Aircraft Company
Wichita, Kansas, USA
D972-4-13
REVISION 4
DATA IN THIS PUBLICATION THAT
TEMPORARY REVISION 1 DATED
JANUARY 2000, AND TEMPORARY
1 JULY 1972
1 MARCH 2004
CESSNA AIRCRAFT COMPANY
MODEL 172 SKYHAWK SERIES
SERVICE MANUAL
LIST OF EFFECTIVE PAGES
INSERT THE LATEST CHANGED PAGES. DESTROY SUPERSEDED PAGES.
Dates of issue for original and revisions are:
01 July 1972
01 July 1973
01 July 1974
Change 3
Revision 4
15 June 1975
1 March 2004
Note: The portion of the text affected by the revision is indicated
by a vertical line in the outer margin of the page.
*The asterisk indicates pages revised, added, or deleted by current revision.
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© Cessna Aircraft Company
Original
Change
Change
0
1
2
Revision 4
Mar 1/2004
CESSNA AIRCRAFT COMPANY
MODEL 172 SKYHAWK SERIES
SERVICE MANUAL
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No.
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© Cessna Aircraft Company
Revision 4
Mar 1/2004
TABLE OF CONTENTS
SECTION Page
1 GENERAL DESCRIPTION ....................... 1-1
2 GROUND HANDLING, SERVICING, CLEANING, LUBRICATION AND
INSPECTION. ................... .... ..... 2-1
3 FUSELAGE .. .. ... .. . .. . . . . . . . . . . . .. . .. . 3-1
4 WINGS AND EMPENNAGE. ...................... 4-1
5 LANDING GEAR AND BRAKES. ................. . 5-1
6 AILERON CONTROL SYSTEM ..................... 6-1
7 WING FLAP CONTROL SYSTEM .................... 7-1
8 ELEVATOR CONTROL SYSTEM .................... 8-1
9 ELEVATOR TRIM TAB CONTROL SYSTEM ............... 9-1
10 RUDDER CONTROL SYSTEM ..................... 10-1
11 ENGINE (LYCOMING "BLUE-STREAK") ................ 11-1
11A ENGINE (CONTINENTAL) ....................... 11A-1
12 FUEL SYSTEM. .......................... . 12-1
13 PROPELLER ............................ 13-1
14 UTILITY SYSTEMS .......................... 14-1
15 INSTRUMENTS AND INSTRUMENT SYSTEMS .............. 15-1
16 ELECTRICAL SYSTEMS. ................. ..... 16-1
17 ELECTRONIC SYSTEMS (DELETED) (See Page iii) ...........
18 STRUCTURAL REPAIR ................ .... .. . 18-1
19 PAINTING ................... ........... 19-1
20 WIRING DIAGRAMS. ...................... 20-1
Change 3
CROSS REFERENCE LISTING OF POPULAR
NAME VS. MODEL NUMBER AND SERIALS
All aircraft, regardless of manufacturer, are certificated under model number designations. However,
popular names are often used for marketing purposes. To provide a consistent method of referring to the
various aircraft, model numbers will be used in this publication unless names are required to differentiate
between versions of the same basic model. The following table provides a cross reference listing of popular
name vs. model numbers.
MODEL SERIALS
POPULAR NAME YEAR MODEL BEGINNING ENDING
172 or SKYHAWK 1969 172K 17257162 17258486
1970 172K 17258487 17259223
1971 172L 17259224 17259903
1972 172L 17259904 17260758
1973 172M 17260759 17261898
172, SKYHAWK or 1974 172M 17261899 17263458
SKYHAWK II 1975 172M 17263459 17265684
SKYHAWK or 1976 172M 17265685
SKYHAWK II
REIMS 172 1969 F172H F17200560 F17200654
REIMS/CESSNA F172 1970 F172H F17200655 F17200754
1971 F172K F17200755 F17200804
1972 F172L F17200805 F17200904
1973 F172M F17200905 F17201034
REIMS/CESSNA F172 1974 F172M F17201035 F17201234
SKYHAWK, SKYHAWK II 1975 F172M F17201235 F17201384
1976 F172M F 17201385
ii Change 3
FOREWORD
This manual contains factory recommended procedures and
instructions for ground handling, servicing and maintaining
Cessna Model 172-Series aircraft. This includes the Models
172, Skyhawk, Reims 172 and Reims/Cessna F172. The Reims
versions of the Model 172 and Skyhawk are identical to the Model
172 and Skyhawk, through Model year 1971, except that they are
powered by O-300-D Rolls Royce engines. Beginning with the
1972 Models, both 172 and F172-Series aircraft are powered by
"Blue-Streak" (Lycoming) engines. Besides serving as a refer-
ence for the experienced mechanic, this manual also covers
step-by-step procedures for the less experienced man. This
manual should be kept in a handy place for ready reference. If
properly used, it will better enable the mechanic to maintain
Cessna 172-Series aircraft and thereby establish a reputation
for reliable service.
The information in this manual is based on data available at
the time of publication, and is supplemented and kept current
by service letters and service news letters published by Cessna
Aircraft Company. These are sent to all Cessna Dealers so that
they have the latest authoritative recommendations for servicing
Cessna aircraft. Therefore, it is recommended that Cessna owners
utilize the knowledge and experience of the factory-trained Dealer
Service Organization.
In addition to the information in this Service Manual, a group
of Vendor publications is available from the Cessna Service Parts
Center which describe complete disassembly, overhaul, and parts
breakdown of some of the various vendor equipment items. A listing
of the available publications is issued periodically in service letters.
Information for Nav-O-Matic Autopilots, Electronic Communi-
cations, and Navigation Equipment are not included in this manual.
These manuals are available from the Cessna Service Parts Center.
iii/(iv blank)
SECTION 1
GENERAL DESCRIPTION
TABLE OF CONTENTS Page
GENERAL DESCRIPTION .......... 1-1 Aircraft Specifications ......... 1-1
Model 172-Series ........... 1-1 Stations ................ 1-1
Description ............ 1-1 Torque Values ............ 1-1
1-1. GENERAL DESCRIPTION. peller. Model 172-Series aircraft feature rear side
windows, a "wrap-around" rear window and a swept-
1-2. MODEL 172-SERIES. back fin and rudder.
1-13. DESCRIPTION. Cessna Model 172 Series 1-4. AIRCRAFT SPECIFICATIONS. Leading parti-
aircraft, described in this manual, are high-wing culars of these aircraft, with dimensions based on
monoplanes of all-metal, semimonocoque construct- gross weight, are given in figure 1-1. If these di-
ion. These aircraft are equipped with a fixed tri- mensions are used for constructing a hangar or corn-
cycle landing gear. Thru 1970 Models, they are puting clearances, remember that such factors as
equipped with flat spring-steel main landing gear nose gear strut inflation, tire pressures, tire sizes
struts. Beginning with 1971 Models, these aircraft and load distribution may result in some dimensions
are equipped with tubular spring-steel main gear that are considerably different from those listed.
struts. The steerable nose gear is equipped with an
air/hydraulic fluid shock strut. Four-place seating 1-5. STATIONS. Station diagrams are shown in fig-
is standard, and a double-width, fold-up auxiliary ures 1-2 and 1-3 to assist in locating equipment when
rear seat may be installed as optional equipment, a written description is inadequate or impractical.
Thru 1971 Models, F172-Series aircraft are equip-
ped with six-cylinder air-cooled 0-300-Series, Con- 1-6. TORQUE VALUES. A chart of recommended
tinental engines, manufactured under license by nut torque values is shown in figure 1-4. These tor-
Rolls Royce. Model 172-Series aircraft, and F172- que values are recommended for all installation pro-
Series aircraft, beginning with 1972 Models, are cedures contained in this manual, except where other
powered by four-cylinder, horizontally opposed, air- values are stipulated. They are not to be used for
cooled "Blue Streak" (Lycoming) engines. Each of checking tightness of installed parts during service.
the engines drives are all-metal, fixed-pitch pro-
1-1
GROSS WEIGHT ........................ 2300 lb NOTE
FUEL CAPACITY
Standard Wing (Total). ............ ..... . 42 gal. These specifications are
Standard Wing (Usable) .................. 38 gal. applicable to both Model 172
Long-Range Wing (Total) .................. 52 gal. and F172-Series aircraft,
Long-Range Wing (Usable) ................. 48 gal. except as indicated.
OIL CAPACITY
(Without External Filter) .............. . 8 qt
(With External Filter). ................... 9 qt
ENGINE MODEL
172-Series (Refer to Section 11 for Engine Data) ........ LYCOMING 0-320 Series
F172-Series (Refer to Section 11A thru 1971 Models). ..... CONTINENTAL 0-300 Series
F172-Series (Refer to Section 11 Beginning with 1972 Models). .LYCOMING.0-320 Series
PROPELLER (Fixed Pitch) ................... 76" MCCAULEY
MAIN WHEEL TIRES ...................... 6.00 x 6, 4-Ply Rating
Pressure (Thru 1970 Models) ................ 24 psi
Pressure (Beginning with 1971 Models) ... .. ...... 29 psi
NOSE WHEEL TIRE (Standard) ................. 5.00 x 5, 4-Ply Rating
Pressure (Thru 1970 Models) ................ 26 psi
Pressure (Beginning with 1971 Models) ............ 31 psi
NOSE WHEEL TIRE (172-Series Only, Optional) ......... 6.00 x 6, 4-Ply Rating
Pressure ................. ........ 26 psi
NOSE GEAR STRUT PRESSURE (Strut Extended) .......... 45 psi
WHEEL ALIGNMENT (Flat Spring Struts)
Camber ......................... 3
°
to 5
°
Toe-In ... .... .............. .. ... 0" to .06"
WHEEL ALIGNMENT (Tublar Spring Struts
Camber .......................... 2
°
to 4
°
Toe-In ... .... ...... ........ .. ... 0" to .18"
* (Tubular Gear is non-adjustable)
AILERON TRAVEL
Up ........................... 20
°
1
°
Down .... .......... .. . 15
°
1°
WING FLAP TRAVEL
(Thru 1972 Models) ..................... 0
°
to 40
°
* 2
°
(Beginning with 1973 Models) ......... ..... .... 0 to 40', +0 -2*
RUDDER TRAVEL (Measured parallel to water line)
Right . . . . . . . . . . . . . . . . . . . . . . . .... 16f 10' ±1
Left . . . . . . . . . . . . . . . . . . . . . . . . . . . 16" 10' 1'
RUDDER TRAVEL (Measured perpendicular to hinge line)
Right ........................... 17- 44' *1'
Left .................... 17' 44' *1
ELEVATOR TRAVEL
Up . ......................... 28
°
, +1
°
- 0
°
Down ........................... 23
°
, +1° -0
°
ELEVATOR TRIM TAB TRAVEL
Up ................................ 28°, +10 -0
°
Down ........................... 13
°
, +1°- 0
°
PRINCIPAL DIMENSIONS
Wing Span (Conventional Wing Tip) ............. . 36' 2"
Wing Span (Conical-Camber Wing Tip) ............ 35' 10"
Wing Span (Conical-Camber With Strobe Lights) ........ ' 36'
Tail Span . . . . . . . . . . . . . . . . . . . . . . . . . 11'
Length ........................ . 26' 11"
Fin Height (Maximum with Nose Gear Depressed and
Flashing Beacon Installed on Fin ............. 8' - 9 1/2"
Track Width (Thru 1970 Models) .............. . 7' 2"
Track Width (Beginning with 1971 Models). ............ 8' - 3 1/2"
BATTERY LOCATION. ..................... Firewall
* No provisions are made for aligning wheels on tubular gear aircraft.
The tolerances provided are to be used only for checking existing
wheel alignment.
Figure 1-1. Aircraft Specifications
1-2 Change 2
THRU 1970
-
WHEEL FAIRINGS BEGINNING WITH 1974 MODELS
STATIONS REMAIN THE SAME
172-SERIES AND F172-SERIES
BEGINNING WITH 1972
Figure 1-2. Reference Stations
Change 1 1-3
:S31ON dOHS
guoln)S bulT '6-1 aewn
i,.Z9 EZ
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- This workshop service repair manual covers all repairs A-Z, both mechanical and electrical.
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- All pages are printable, allowing you to print only the necessary sections.
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- Specific to all models for the stated years and engine types.
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