Craftsman 917.255840 User Manual

Repair Parts Manual

LAWN TRACTOR

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19 HP,* 46" Mower
Electric Start
Automatic Transmission

Model No.

917.255840

® Registered Trademark / TM Trademark of KCD IP, LLC in the United States, or Sears Brands, LLC in other countries
® Marca Registrada /

01.08.16 BD Printed in the U.S.A.

TM

Marca de Fábrica de KCD IP, LLC en Estados Unidos, o Sears Brands, LLC in otros países

For answers to your questions
about this product, call:

1-888-331-4569

Craftsman Customer Help Line

Sears Brands Management Corporation, Hoffman Estates, IL 60179 U.S.A.

Visit our Craftsman website: www.craftsman.com

* The power rating as declared by the engine manufacturer is the

average gross power output at the specified RPM of a typical
production engine for the engine model measured using SAE

115793226 Rev. 2

Standards for engine gross power. Please refer to the engine
manufacturer for details.

WARNING: This tractor is equipped with
an internal combustion engine and should not
be used on or near any unimproved forest­covered, brush-covered or grass-covered
land unless the engine’s exhaust system
is equipped with a spark arrester meeting
applicable local or state laws (if any). If a
spark arrester is used, it should be maintained
in effective working order by the operator.

In the state of California the above is required
by law (Section 4442 of the California Public
Resources Code). Other states may have
similar laws. Federal laws apply on federal
lands. A spark arrester for the muffler is
available through your nearest Sears service
center (See ENGINE ASSEMBLY section of
this manual).

REPAIR PROTECTION AGREEMENTS

Congratulations on making a smart purchase.
Your new Craftsman® product is designed
and manufactured for years of dependable
operation. But like all products, it may require
repair from time to time. That’s when having
a Repair Protection Agreement can save you
money and aggravation.

Purchase a Repair Protection Agreement
now and protect yourself from unexpected
hassle and expense.

Here’s what’s included in the Agreement:

• Expert service by our 12,000 professional
repair specialists.

• Unlimited service and no charge for
parts and labor on all covered repairs.

• Product replacement if your covered
product can’t be fixed.

• Discount of 25% from regular price of
service and service-related parts not
covered by the agreement; also, 25% off
regular price of preventive maintenance
check.

• Fast help by phone – phone support
from a Sears representative on products
requiring in-home repair, plus convenient
repair scheduling.

Once you purchase the Agreement, a simple
phone call is all that it takes for you to sched­ule service. You can call anytime day or night,
or schedule a service appointment online.

Sears has over 12,000 professional repair
specialists, who have access to over 4.5
million quality parts and accessories. That’s
the kind of professionalism you can count on
to help prolong the life of your new purchase
for years to come. Purchase your Repair
Protection Agreement today!

Some limitations and exclusions apply.
For prices and additional information call

1-800-827-6655.

SEARS INSTALLATION SERVICE

For Sears professional installation of home
appliances, garage door openers, water
heaters, and other major home items, in the
U.S.A. call 1-800-4-MY-HOME®.

TRACTOR - - MODEL NUMBER 917.255840

BRIGGS & STRATTON ENGINE-MODEL NUMBER 33R877, TYPE NUMBER 0021-G1

KEY PART
NO. NO. DESCRIPTION

633 699813 Seal-Choke/Throttle (Choke

633A 690998 Seal-Choke/Throttle (Choke

634 698779 Spring/Seal Assembly
635 691909 Boot-Spark Plug
654 690958 Nut (Carburetor)
684 697157 Screw (Breather Passage Cover)
691 692407 Seal-Governor Shaft
697 791680 Screw (Drive Cap)
718 690959 Pin-Locating
729 691224 Clip-Wire
741 697128 Gear-Timing
750 790832 Screw (Oil Pump Cover)
757 793242 Link-Counterweight
758 793763 Counterweight
759 697392 Pin-Counterweight
773 796448 Retainer (Fuel Pump)
783 593935 Gear-Pinion (Steel)
789 698329 Harness-Wiring
797 693167 Nut (Brush Retainer)
801 691283 Cap-Drive
802 691286 Cap-End
830 691095 Stud-Rocker Arm
842 691031 Seal-O Ring (Dipstick)
847 790443 Dipstick/Tube Assembly
850 100106 Sealant-Liquid
851 692424 Terminal-Spark Plug
868 690968 Seal-Valve
877 790544 Wire/Connector-Alternator (Not

883 692236 Gasket-Exhaust (Not Used On

914 691108 Screw (Rocker Cover)
918 791744 Hose-Vacuum (Formed) (Cut to

943 690589 Seal-O Ring (Oil Pump Cover)
947 699915 Solenoid-Fuel
964 799159 Cap-Connector
965 499613 Cover-Oil Pump
967 793685 Filter-Pre Cleaner
968 591644 Cover-Air Cleaner
975 699502 Bowl-Fuel
987 698777 Seal-Throttle Shaft
1023 797421 Cover-Rocker
1005 796084 Fan-Flywheel
1017 796981 Screen-Oil Pump
1022 272475s Gasket-Rocker Cover (Not

1024 794644 Pump-Oil

Shaft)

Shaft) (Not Used On This
Engine)

Used On This Engine)

This Engine)

Required Length)

Used On This Engine)

KEY PART
NO. NO. DESCRIPTION

1026 692003 Rod-Push (Intake) (Aluminum)
1026A692011 Rod-Push (Exhaust) (Steel)
1027 696854 Filter-Oil
1029 691751 Arm-Rocker
1034 690822 Guide-Push Rod
1036 Label-Emissions (Available

1040 698368 Plate-Trim
1044 698139 Screw (Flywheel)
1051 691265 Ring-Retaining
1058 N/A Operator’s Manual
1059 698516 Kit-Screw/Washer (Alternator)

1090 691293 Retainer-Brush
1091 691333 Cap-Limiter
1095 794152 Gasket Set-Valve
1119 691183 Screw (Alternator)
1127 695407 Screw (Float Bowl)
1139 796449 Washer (Fuel Pump)
1263 697124 Reed-Breather
1264 697104 Screw (Breather Reed)
1265 794151 Support-Blower Housing
1266 691917 Seal-O Ring (Intake Elbow) (Red)
1266A697123 Seal-O Ring (Intake Elbow)

1270 793243 Plug-AVS Counterweight
1279 691108 Screw (Blower Housing Sup-

1329 N/A Replacement Engine (Not

1330 N/A Repair Manual (Not Available

1332 591991 Washer (Rotating Screen)

Carburetor Overhaul Kit Key No. 121
Engine Gasket Set Key No. 358
Valve Gasket Set Key No. 1095

NOTE: All component dimensions given in U.S. inches

1 inch = 25.4 mm

NOTE: All component dimensions given in U.S.
inches 1 inch = 25.4 mm

from a Briggs & Stratton Autho­rized Dealer)

(Not Used On This Engine)

(Not Used On This Engine)

port)

Available at this Printing)

at this Printing)

(Used on Steel Rotating
Screen)

2

23

TRACTOR - - MODEL NUMBER 917.255840

BRIGGS & STRATTON ENGINE-MODEL NUMBER 33R877, TYPE NUMBER 0021-G1

KEY PART
NO. NO. DESCRIPTION

1 591465 Cylinder Assembly
2 797673 Kit-Bushing/Seal
3 391086s Seal-Oil (Magneto Side)
4 592849 Sump-Engine
5 591750 Head-Cylinder
7 794114 Gasket-Cylinder Head
7A 796584 Gasket-Cylinder Head (Not

9 697109 Gasket-Breather (Not Used On

11 794683 Tube-Breather
12 697110 Gasket-Crankcase
13 592244 Screw (Cylinder Head)
15 690946 Plug-Oil Drain
16 591763 Crankshaft
20 795387 Seal-Oil (PTO Side)
22 692125 Screw (Crankcase Cover/

23 591759 Flywheel
24 591757 Key-Flywheel (Steel)
25 795858 Piston Assembly (Standard)
795877 Piston Assembly (.020” Oversize)
26 794126 Ring Set (Standard)
794127 Ring Set (.020” Oversize)
27 698469 Lock-Piston Pin
28 795861 Pin-Piston
29 794571 Rod-Connecting
32 791118 Screw (Connecting Rod)
33 591752 Valve-Exhaust
34 591751 Valve-Intake
35 691279 Spring-Valve (Intake)
36 691279 Spring-Valve (Exhaust)
37 699882 Guard-Flywheel
42 499586 Keeper-Valve
43 691968 Slinger Governor/Oil
45 690564 Tappet-Valve
46 793880 Camshaft
48 N/A Short Block (Not Available at

50 592842 Manifold-Intake
51 692137 Gasket-Intake
51A 796081 Gasket-Intake (Not Used On

53 591260 Stud (Carburetor)
54 691148 Screw (Intake Manifold)
78 691693 Screw (Flywheel Guard)
94 793610 Kit-Idle Mixture
95 690718 Screw (Throttle Valve)
98 695408 Kit-Idle Speed
104 694918 Pin-Float Hinge
105 696136 Valve-Float Needle
108 695419 Valve-Choke
117 796251 Jet-Main (Standard)
118 791406 Jet-Main (High Altitude) (5000

121 796184 Kit-Carburetor Overhaul
125 591736 Carburetor
127 690727 Plug-Welch
130 792747 Valve-Throttle
131 792765 Kit-Throttle Shaft
133 694914 Float-Carburetor
135 796400 Tube-Fuel Transfer (Original

Used On This Engine)

This Engine)

Sump)

this Printing)

This Engine)

> 9000 Feet)

Carburetor)

KEY PART
NO. NO. DESCRIPTION

135A 698780 Tube-Fuel Transfer (Service

137 698781 Gasket-Float Bowl
141 592937 Kit-Choke Shaft
187 791805 Line-Fuel (Formed)
187A 791766 Line-Fuel (Cut to Required

188 691693 Screw (Control Bracket)
192 691986 Adjuster-Rocker Arm
202 691841 Link-Mechanical Governor
209 796260 Spring-Governor (Green)
216 691840 Link-Choke
217 695409 Spring-Choke Return
222 694042 Bracket-Control
227 691374 Lever-Governor Control
232 691842 Spring-Governor Link
238 691843 Cap-Valve
240 691035 Filter-Fuel
265 691024 Clamp-Casing
267 794904 Screw (Casing Clamp)
276 695410 Washer-Sealing
304 592814 Housing-Blower
305 697102 Screw (Blower Housing) (1/4-

305A 795891 Screw (Blower Housing) (#10-

305B 799370 Screw (Blower Housing) (1/4-

306 794953 Shield-Cylinder
307 691693 Screw (Cylinder Shield)
309 593934 Motor-Starter
310 690323 Screw (Starter Motor)
311 497608 Brush Set
324 796309 Screen/Cup Assembly
333 592841 Armature-Magneto
334 691061 Screw (Magneto Armature)
337 491055s Plug-Spark
358 796187 Gasket Set-Engine
377 691639 Key-Woodruff
404 691691 Washer (Governor Crank)
415 794129 Plug (Cover/Retainer)
415A 794903 Plug (Intake Manifold)
431 799043 Elbow-Intake
445 793569 Filter-Air Cleaner Cartridge
462 691261 Washer (Starter Cable)
474 592831 Alternator
503 691532 Strap-Starter (Not Used On

505 691251 Nut (Governor Control Lever)
510 693699 Drive-Starter
513 692024 Clutch-Drive
523 699908 Dipstick
524 691032 Seal-Dipstick Tube
525 697085 Tube-Dipstick
552 697144 Bushing-Governor Crank
562 691119 Screw (Governor Control Lever)
579 691029 Nut (Starter Cable)
584 794682 Cover-Breather Passage
601 791850 Hose-Clamp (Green)
614 691620 Pin-Cotter (Governor Crank)
616 692012 Crank-Governor
617 692138 Seal-O Ring (Intake Manifold)

Carburetor)

Length)

20x1.21)

16x.43)

20x.90)

This Engine)

(Red)

SCHEMATIC

SCH11

NOTE

YOUR TRACTOR IS
EQUIPPED WITH A SPECIAL
ALTERNATOR SYSTEM.
THE LIGHTS ARE NOT
CONNECTED TO THE
BATTERY, BUT HAVE THEIR
OWN ELECTRICAL SOURCE.
BECAUSE OF THIS, THE
BRIGHTNESS OF THE LIGHTS
WILL CHANGE WITH ENGINE
SPEED. AT IDLE THE LIGHTS
WILL DIM. AS THE ENGINE IS
SPEEDED UP, THE LIGHTS
WILL BECOME THEIR

BRIGHTEST.

IGNITION SWITCH

POSITION

CIRCUIT

M+G+A1

OFF

RUN/OVERRIDE

B+A1

B+A1RUN

B+S+A1START

TRACTOR - - MODEL NUMBER 917.255840

“MAKE”

L+A2

RED

A

AMMETER

(OPTIONAL)

S

B

G

A2

L

BLACK

CHASSIS HARNESS

WHITE

M

A1

BLUE

CONNECTOR

(MATINGSIDE)

BATTERY

FUSE

BLACK

BLACK

BLACK

BLACK /WHITE

BLUE BLACK

FUEL SHUT-OFF

SOLENOID

(IF SO EQUIPPED)

RED

LIGHT SWITCH

63

52

41

DER

CLUTCH/BRAKE

IGNITION

UNIT

(OPTIONAL)

HOUR

METER

FUEL

LINE

LIGHTING SYSTEM OUTPUT
5 AMP AC @ 3600 RPM

ORANGE

BROWN

6

3

5

2

4

1

DASH HARNESS

CONNECTOR

(MATINGSIDE)

SOLENOID

BLACK

WHITE

(PEDAL UP)

BLACK

BLACK

2

BLACK

3

BLACKBLACK

1

GRAY

6

JUNCTION

CONNECTOR

CHASSIS

HARNESS

(2 PLUGS ON

TWIN CYL. ENGINES)

CHARGING SYSTEM OUTPUT
3 AMP DC @ 3600 RPM

DIODE

14 VOLTS AC MIN. @ 3600 RPM (LIGHTS OFF)

HEADLIGHTS

WIRING INSULATED CLIPS
NOTE: IF WIRING INSULATED
CLIPS WERE REMOVED FOR
SERVICING OF UNIT, THEY
SHOULD BE RE-INSTALLED TO
PROPERLY SECURE YOUR
WIRING.

STARTER

REVERSE SWITCH
(NOT IN REVERSE)

(NOT OCCUPIED)

SPARK

PLUGS GAP

12V

POWER OUTLET

(OPTIONAL)

28 VOLTS AC MIN. @ 3600 RPM
(CHARGING SYSTEM DISCONNECTED)

ALTERNATOR

M

M

ATTACHMENT CLUTCH

(CLUTCH OFF)

BLACK

SEATSWITCH

SHORTING

CONNECTOR

BLACK

GRAY

NON-REMOVABLE

CONNECTIONS

REMOVABLE

CONNECTIONS

22

3

ELECTRICAL

TRACTOR - - MODEL NUMBER 917.255840

TRACTOR - - MODEL NUMBER 917.255840

BRIGGS & STRATTON ENGINE-MODEL NUMBER 33R877, TYPE NUMBER 0021-G1

T05S

27

2

1

8

28

55

12V Outlet (If Equipped)

103

59

Service Minder (If Equipped)

4646

304

187

90

22

79

21

87

99

100

33

601

30

773

1139

918

601

24

967

445

968

305B

34

27

43

42

26

40

41

305

1040

25

1026A

15

16

71

102

29

222

240

431

1266

187

105

1026

601

305A

75

4

43

45

45

118

188

616

265

267

964

1017

12

415A

20

965

943

750

404

614

306

307

654

53

1024

1139

125

131

130

51

773

227

187A

141

108

634

217

95

987

133

104

975

137

1127

276

23

505

562

601

633

98

94

127

105

135A

137

947

276

1051

783

25

27

26

11

684

584

9

918

37

78

117

324

415

1091

1332

1044

1005

1270

1027

1279

759

216

387

29

32

1265

22

758

757

135

137

601

4

21