PARTS
MANUAL
Model
PKX310 / PKX320
PUMP
PUB-EP
Rev. 0812
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HOW TO USE THIS MANUAL
Robin engines are identified by MODEL, SPECIFICATION, and CODE NUMBER. For each
model there may be many different versions called specifications. Each specification will be
unique in some way. The difference may only be the paint color or it may have a different
type of PTO or some other significant difference.
In order the identify the correct service part number, it is important to confirm the specifica-
tion and code numbers for your engine. The specification and code number together are
know as the PRODUCT NUMBER.
All Robin 4 cycle engines have a Product Number label similar to the label illustrated below.
The Product Number Label has a 15 digit alphanumeric string that consists of the
SPECIFICATION (SPEC) number (11 digits) and the CODE number (4 digits). Please
note the illustration below:
E X 1 7 0 D
X X X X
SPEC NO. (11 digits)
CODE NO. (4 digits)
PRODUCT NO. (15 digits)
PKX310 / PKX320
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MANUAL LAYOUT
1
2
4
3
1
3
9
6
7
2
5
4
8
1. SECTION NAME
Parts are broadly classified according to their functions.
Refer to the Group Index (table of contents) for respective section name.
2. FIG. No.
TheFIG.numberindexesthereferenceandpartnumberstotheillustration.Figurenumbers
thatvaryonlyinthetensplace(i.e..:700and710)areinagroupofthesamesection
(i.e..:Electrical Device Group).
3. REF. No .
The Reference number identifies the part illustration with the corresponding part number in the
part list.
4. SUBASSEMBLY
SUBASSEMBLY parts of part assembly are listed below the assembly part. The subassembly
part reference number is indicated by the number led by "-" such as "-1", "-2".
5. PART NUMBER
6. DESCRIPTION
7. QTY.
It is the number assigned for sales unit. Use the PART No. when making an order.
It is designation of the part.
Quantity of each part used for each product.
8. REMARKS
This gives a distinctive feature and/or a supplementary comment for the type, the specification,
and the part concerned. It also shows part number(s) interchangeable for the part.
9. FROM-TO
This section shows the CODE No. to indicate the history of progress in which improved parts
have been introduced in the product. The FROM-TO CODE No. helps to identify PART No.
being employed in the product concerned. See the examples below:
-
2101-
- 2100
The part is used in the product irrespective of CODE No.
The part is used in the products with CODE No. of 2101 and after this number.
The part is used in the products with CODE No. of 2100 and before this number.
PKX310 / PKX320
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GROUP INDEX
Group Name
Page
CRANKCASE GROUP............................................................................... 6
CRANKSHAFT GROUP............................................................................. 8
INTAKE and EXHAUST GROUP.............................................................. 10
GOVERNOR GROUP .............................................................................. 18
COOLING and STARTING GROUP......................................................... 22
FUEL, LUBRICANT GROUP.................................................................... 26
CARBURETOR GROUP .......................................................................... 28
ELECTRIC DEVICE GROUP .................................................................. 32
ACCESSORY GROUP............................................................................. 38
INDEX OF DESCRIPTION SYMBOLS
SYMBOL
DESCRIPTION
SYMBOL
DESCRIPTION
AY...........................ASSEMBLY
CP...........................COMPLETE
EX...........................EXPORT (from Japan)
FIG..........................FIGURE
P=...........................PITCH (in mm)
P.T.O. (PTO) ...........POWER TAKE OFF
REF.........................REFERENCE
R.H. (RH)................RIGHT HAND SIDE
RR. .........................REAR
FR...........................FRONT
" ..............................INCH
INCL. ......................INCLUDE
~L............................LITER
L= ...........................LENGTH (in. mm)
L.H. (LH).................LEFT-HAND SIDE
MECH.....................MECHANICAL
NO (NON)...............NONE
STD. .......................STANDARD
SW..........................SWITCH
T= ...........................THICKNESS (in mm)
UN ..........................UNIT
U.S..........................UNDER SIZE
~V...........................VOLTAGE
~W..........................WATT
OPT.........................OPTIONAL
O.S. ........................OVER SIZE
W/ ...........................WITH
W/O ........................WITHOUT
PKX310 / PKX320
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FIG. 1
CRANKCASE GROUP
FIG. 100
610
710
285
700
PKX310 / PKX320
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FIG. 1
CRANKCASE GROUP
Ref. Part Number
Description
Crankcase Cp
Valve Guide
Stem Seal
Qty Remarks
To-From
Fig.
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
10
20
26
30
40
50
60
70
75
80
90
277-10102-51
237-14202-03
277-16010-01
044-02502-00
060-02800-21
277-15011-03
010-50802-50
010-50603-51
044-00600-20
040-11400-30
021-11400-20
1
2
1
1
1
2
2
2
1
2
2
1
1
1
1
1
2
2
6
1
1
4
1
1
1
2
4
1
Oil Seal
Ball Bearing
Pipe Knock
Stud
Stud
Oil Seal
Plug
Gasket
210 277-11001-31
220 044-02502-10
230 X60-02501-40
250 277-45004-J1
260 277-41901-03
280 277-63601-08
285 277-63601-30
300 001-04083-50
610 277-13001-11
620 277-15001-43
630 011-00802-40
631 011-00803-10
680 277-15503-01
690 277-16001-13
700 277-15011-03
710 011-00600-20
960 277-99001-47
Main Bearing Cover Cp
Oil Seal
Ball Bearing
Governor Gear Cp
Governor Sleeve
Gasket
Oil Gauge Ay
Flange Bolt
Cylinder Head Cp
Gasket, head
Flange Bolt
Flange Bolt
Rocker Cover Cp
Gasket, rocker cover
Pipe Knock
Flange Bolt
Gasket Set
PKX310 / PKX320
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FIG. 2
CRANKSHAFT GROUP
FIG. 200
PKX310 / PKX320
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FIG. 2
CRANKSHAFT GROUP
Ref. Part Number
Description
Qty Remarks
To-From
Fig.
200
200
200
200
200
200
200
200
200
200
200
200
200
200
10
50
70
20A-20302-01
018-01400-20
032-30300-10
Crankshaft Cp
Flange Nut
1
1
1
1
Woodruff Key
Connecting Rod Ay
Connecting Rod Ay
Connecting Rod Bolt
Piston Pin
Piston
Piston
Piston
Piston Ring Set
Piston Ring Set
Piston Ring Set
Clip
310 277-22501-10
311 277-22502-00
320 277-23001-03
350 277-23301-13
360 277-23401-J3
361 277-23403-J3
362 277-23404-J3
370 277-23531-07
371 277-23532-07
372 277-23533-07
380 056-51600-10
1
2
1
1
1
1
1
1
1
2
Undersize
Std
Oversize .25mm
Oversize .50mm
Std
Oversize .25mm
Oversize .50mm
PKX310 / PKX320
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FIG. 3
INTAKE and EXHAUST GROUP
FIG. 300
200
202
23
PKX310 / PKX320
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FIG. 3
INTAKE and EXHAUST GROUP
Ref. Part Number
Description
Qty Remarks
To-From
Fig.
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
10
23
27
34
35
37
38
60
70
80
90
95
277-31601-31
277-35101-01
024-00600-10
277-38601-03
277-36401-03
277-36501-03
277-38702-03
279-33601-03
269-33701-03
277-33401-H3
277-33501-H3
132-10KA0-31
Camshaft Cp
Pin Cp, camshaft
O ring
Pin, spring
Release Lever
Clip
Return Spring
Valve Spring
Spring Retainer
Intake Valve
Exhaust Valve
Ccollet Valve
Timing Chain
Tentioner
Spring, tentioner
Pin, tentioner
Chain Guide
Pin Cp, rocker
Clip
Rocker Arm Ay, set
Adjust Screw
Adjust Screw
Nut
Nut
Flange Bolt
Muffler Cp
Spark Arrester Cp
Tapping Screw
Muffler Cover Cp
Gasket, Muffler
Flange Nut
Tapping Bolt
Flange Bolt
Flange Bolt
Washer
1
1
1
1
1
1
1
2
2
1
1
4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
2
1
1
1
2
1
1
150 277-35601-11
160 277-36911-03
163 277-37101-03
166 277-36902-03
170 277-36913-13
200 277-35002-01
202 003-13050-00
219 277-36001-07
230 014-90500-20
231 014-90500-20
240 017-00500-30
241 017-00500-30
290 011-00600-20
310 277-30111-J1
315 277-37601-01
317 015-00400-60
320 277-34204-21
340 277-35201-13
350 002-38080-00
360 015-20600-90
361 011-00600-10
365 011-00803-20
367 20A-02101-00
385 277-37203-H1
387 015-00400-60
540 277-32902-J1
550 277-35902-J3
560 277-35903-J3
570 002-38060-00
580 011-00600-50
850 277-32760-08
Screen Cp
Tapping Screw
Insulator Cp
Gasket 2, insulator
Gasket 1, insulator
Flange Nut
Flange Bolt
Breather Pipe
PKX310 / PKX320
- 11 -
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FIG. 3
INTAKE and EXHAUST GROUP
FIG. 315
PKX310 / PKX320
- 12 -
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FIG. 3
INTAKE and EXHAUST GROUP
Ref. Part Number
510 277-32615-20
-200 277-32630-18
-210 277-32610-08
-220 277-32604-08
-250 277-32640-08
-260 277-32609-08
-270 277-32741-18
-272 277-32607-08
520 277-32611-07
Description
Air Cleaner Ay
Base Cp
Packing
Packing
Cover Cp
Label
Wing Nut
Wing Nut
Element Set
Qty Remarks
To-From
Fig.
315
315
315
315
315
315
315
315
315
1
1
1
1
1
1
1
1
1
PKX310 / PKX320
- 13 -
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FIG. 4
GOVERNOR GROUP
FIG. 400
13
PKX310 / PKX320
- 14 -
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FIG. 4
GOVERNOR GROUP
Ref. Part Number
Description
Qty Remarks
To-From
Fig.
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
13
20
30
40
50
60
70
80
277-42301-40
277-42201-33
277-42701-11
277-42801-23
003-13050-00
001-14062-50
018-60600-20
277-42510-13
Governor Lever Ay
Governor Shaft
Governor Rod Cp
Rod Spring
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
Clip
Bolt and Washer Ay
Nut
Governor Spring
Speed Control Lever
Stop Plate
310 277-43303-03
340 277-43502-03
350 277-44501-03
355 021-70600-70
360 004-31062-50
365 237-45004-23
435 277-46002-01
450 002-35060-00
485 011-00600-20
Washer
Friction Washer
Screw, panhead
Spring, adjust
Speed Control Bracket Cp
Self Lock Nut
Flange Bolt
PKX310 / PKX320
- 15 -
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FIG. 5
COOLING and STARTING GROUP
FIG. 500
110
PKX310 / PKX320
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FIG. 5
COOLING and STARTING GROUP
Ref. Part Number
Description
Qty Remarks
To-From
Fig.
500
500
500
500
500
500
500
500
500
500
10
20
25
40
60
61
80
81
277-51201-11
073-20058-20
073-20058-60
011-00600-30
277-52711-21
277-52702-03
001-04061-60
011-00600-20
Blower Housing Cp
Label, trademark
Label, warning
Flange Bolt
Baffle 1 Cp, case
Baffle 2, head
Flange Bolt
Flange Bolt
Cooling Blower
Flange Bolt
1
1
1
4
1
1
1
1
1
4
110 20A-54101-13
220 011-00600-30
PKX310 / PKX320
- 17 -
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FIG. 5
COOLING and STARTING GROUP
FIG. 522
PKX310 / PKX320
- 18 -
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FIG. 5
COOLING and STARTING GROUP
Ref. Part Number
Description
Qty Remarks
To-From
Fig.
210 20A-50201-30
Recoil Starter Ay
1
522
PKX310 / PKX320
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FIG. 6
FUEL LUBRICANT GROUP
FIG. 600
30
23
80
PKX310 / PKX320
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FIG. 6
FUEL LUBRICANT GROUP
Ref. Part Number
Description
Qty Remarks
To-From
Fig.
600
600
600
600
600
600
600
600
600
600
600
600
10
20
23
30
40
48
60
63
70
80
90
277-60101-21
073-20057-60
277-95114-03
043-04400-50
X64-13600-10
X50-51200-20
002-38060-00
011-00601-30
277-62601-11
X85-10613-51
X56-11100-60
Fuel Tank Cp
Label, warning
Label, EX16
Fuel Tank Cap Cp
Fuel Filter
1
1
1
1
1
1
2
1
1
1
2
1
Union
Flange Nut
Flange Bolt
Fuel Pipe Cp
Rubber Pipe
Hose Clamp
Choke Lever Cp
224 277-43801-01
PKX310 / PKX320
- 21 -
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FIG. 6
FUEL LUBRICANT GROUP
FIG. 640
210
-62
-102
PKX310 / PKX320
- 22 -
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FIG. 6
FUEL LUBRICANT GROUP
Ref. Part Number
Description
Carburetor Ay
Throttle Valve
Screw
Choke Valve
Pilot Jet
Choke Lever
Throttle Shaft A
Bolt
Needled
Pin
Float Body Ay
Packing
Chamber Packing
Float
Main Nozzle
Main Jet
Clip
Bolt
Screw
Spring
Air Jet
Air Jet, pilot
Seal
Packing
Seal
Qty Remarks
To-From
Fig.
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
640
210 276-62302-30
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
-1
-2
-3
-5
106-62538-08
209-62351-08
277-62525-08
246-62420-08
277-62520-08
276-62531-18
227-62451-08
277-62500-08
277-62515-08
277-62506-08
214-62450-08
214-62540-08
226-62506-08
276-62440-08
252-62405-08
226-62701-18
277-62360-08
106-62556-08
283-62357-08
207-62410-08
106-62410-08
236-62680-08
236-62541-08
-8
-11
-12
-14
-15
-16
-17
-18
-19
-20
-22
-24
-28
-40
-41
-44
-45
-62
-79
-102 246-62390-08
-144 277-62553-08
-300 279-62103-20
-302 277-62110-18
-303 277-62100-18
-325 277-62552-08
-327 165-62377-08
Nut
Fuel Strainer Ay
Packing
Cup
O ring
Screw
PKX310 / PKX320
- 23 -
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FIG. 7
ELECTRIC GROUP
FIG. 700
PKX310 / PKX320
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FIG. 7
ELECTRIC GROUP
Ref. Part Number
Description
Qty Remarks
To-From
Fig.
700
700
700
700
700
700
10
11
30
50
20A-79231-01
20A-79431-01
001-14062-50
277-73101-H1
Flywheel Cp
Ignition Coil Cp
Bolt and Washer Ay
Wire 1
Spark Plug
Spark Plug Cap
1
1
2
1
1
1
100 065-01401-50
110 065-50001-10
PKX310 / PKX320
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FIG. 7
ELECTRIC GROUP
FIG. 770
PKX310 / PKX320
- 26 -
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FIG. 7
ELECTRIC GROUP
Ref. Part Number
700 277-76301-21
705 KU3-11071-01
740 001-14061-60
741 015-00400-90
780 056-90000-20
Description
Qty Remarks
To-From
Fig.
770
770
770
770
770
Oil Sensor Cp
Float C/U Cp5
Bolt and Washer Ay
Tapping Screw
Purse Lock
1
1
2
2
1
PKX310 / PKX320
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FIG. 42
PUMP GROUP
FIG. 4200
PKX310 / PKX320
- 28 -
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FIG. 42
PUMP GROUP
Ref. Part Number
110 470-01127-95
110 476-01215-47
115 470-01139-89
120 470-01143-79
120 476-01210-47
130 470-01150-57
130 476-01210-46
140 470-01106-64
145 470-01104-91
150 470-01150-15
170 470-01180-78
180 471-00000-50
210 470-01127-96
280 471-00000-03
285 471-00000-02
310 470-01128-76
314 471-00000-50
320 470-01127-99
410 470-01133-37
414 471-00000-34
420 470-01105-84
460 470-01180-79
510 470-01181-95
520 471-00000-06
610 470-01283-85
670 470-01105-15
680 471-00000-65
681 471-00000-71
684 471-00000-68
686 471-00000-66
690 471-00000-57
691 471-00000-57
910 470-01214-67
Description
Casing
Casing
Qty Remarks
To-From
Fig.
1
1
1
1
1
1
1
1
3
1
1
4
1
4
4
1
3
1
1
4
1
1
1
3
1
4
4
4
4
4
4
4
1
PKX310
PKX320
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
4200
O ring
Inner Casing
Inner Casing
Impeller
PKX310
PKX320
PKX310
PKX320
Impeller
Mechanical Seal
Adjusting Washer
O ring
Plug Ay
Bolt and Washer Ay
Flange Bracket
Socket Bolt
Seal Washer
Suction Flange
Bolt and Washer Ay
Check Valve
Delivery Flange
Bolt and Washer Ay
Packing, delivery
Plug Ay
Strainer
Hose Band
Frame
Cushion Rubber
Bolt and Washer Ay
Bolt and Washer Ay
Spring Washer
Washer
Nut
Nut
Label, pump name
PKX310 / PKX320
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PRINTED IN THE USA
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