Owner's Manual - FIMCO Industries

Owner's Manual 

Model: SK-61-4R (5301336) 

(60 Gallon Skid Sprayer w/2.5 H.P. Engine, 4-Roller Pump, Deluxe Handgun) 

Technical Specifications 

• 2.5 H.P. Recoil Start Engine 

• 4 Roller Pump - 6 G.P.M. 

• Pressure Relief Valve 

• Pressure Gauge 

• Suction Line Filter 

• 25 Ft. Hand Gun Hose 

General Information 

Thank you for purchasing this product. The purpose of this 

manual is to assist you in operating and maintaining your skid 

sprayer. Please read it carefully, as it furnishes information 

which will help you achieve years of trouble-free operation. 

Warranty/Parts/Service 

Products are warranted for one year from date of purchase 

against manufacturer or workmanship defects. 

Commercial users have a 90 day warranty. 

Your authorized dealer is the best source of replacement parts 

and service. To obtain prompt, efficient service, always 

remember to give the following information... 

• Pistol Grip Spray Gun 

• Optional Trailers & Boom Features Available 

Assembly 

The sprayer is completely assembled except for the pressure 

gauge, and the only other time any assembly is required is if 

you have purchased the optional trailer assembly, or optional 

boom assembly. Note: Add proper oil to the engine crankcase 

and gasoline to the gas tank. Refer to the engine manual for 

the correct type and amount. It is important to test the sprayer 

with plain water before actual spraying is attempted. This will 

enable you to check the sprayer for leaks in the plumbing 

system. 

- Correct Part Description and/or part number. 

- Model number/Serial number of your sprayer. 

Part descriptions and part numbers can be obtained from the 

illustrated parts list section(s) of this manual. 

Whenever you need parts or repair service, contact your 

distributor/dealer first. For warranty work, always take your 

original sales slip, or other evidence of purchase date, to your 

distributor/dealer. 

www.fimcoindustries.com 

1000 FIMCO Lane, P.O. Box 1700, North Sioux City, SD 57049 

Toll Free Phone: 800-831-0027 : Toll Free Fax: 800-494-0440 

Form No. 804 [5004589 (02/14)] Printed in the U.S.A.

Testing the Sprayer 

1. Open the tank lid and be sure the tank is clean and free of 

foreign material. Fill the tank about 1/2 full with plain water. 

NOTE: 

It is VERY important for you to test your sprayer with plain 

water before actual spraying is attempted. This will enable 

you to check the sprayer for leaks, without the possibility of 

losing any expensive chemicals. 

CAUTION: Always be sure that water has reached the roller 

pump before starting your sprayer. If the pump is run dry, 

serious damage to the pump will result. Do not run your 

sprayer with the boom/handgun line closed AND the 

bypass line closed. Doing this will damage the pump. 

2. Open the brass valve in the suction line and allow water to 

flow to the pump. The valve is located at this point to enable the 

strainer to be taken apart for cleaning, while solution remains in 

the tank. 

3. It is always best to start the sprayer at little or no pressure. 

This sprayer is equipped with a spring loaded pressure 

relief/bypass valve. Turn the valve knob out to decrease 

pressure and in for increased pressure. 

The bypass valve is the "pressure control" for the entire 

plumbing system. The more that valve is open, the lower your 

line pressure. Almost fully closed provides maximum pressure to 

your boom and/or handgun. Never run your system with this 

valve 100% closed. 

4. You may now start the sprayer engine following the engine 

manufacturers instructions. Let the sprayer run at low pressure 

until water has reached the handgun and all air has been 

purged from the system. 

Information About The Sprayer 

In this pumping system, solution is drawn from the tank, and 

forced to a planned source, such as boom nozzles, or 

handgun. The pressure is controlled by opening/closing the 

valve which recirculates solution back into the tank.. 

Maintenance During/After Spraying 

Periodically close the suction line valve. Check the line strainer 

and clean the screen. Always flush the entire plumbing system 

with water or a neutralizing agent, such as FIMCO Tank 

Neutralizer and Cleaner, after completing the spraying operation. 

Proper care and maintenance will prolong the life of your sprayer. 

After use, fill the sprayer tank part way with water. Start the 

sprayer, and allow the clear water to be pumped through the 

plumbing system and out through the spray nozzles. 

Refill the tank about half full with plain water and use FIMCO 

Tank Neutralizer and Cleaner, and repeat cleaning instructions 

above. 

Flush the entire sprayer with the neutralizing/cleaning agent, then 

flush out one more time with plain water. Follow the chemical 

manufacturer's disposal instructions of all wash or rinsing water. 

For the boom, (if applicable) remove the tips and screens from 

the nozzle assemblies. Wash these items out thoroughly. Blow 

the orifice clean and dry. If the orifice remains clogged, clean it 

with a fine bristle (NOT WIRE) brush, or with a toothpick. Do not 

damage the orifice. Water rinse and dry the tips before storing. 

WARNING: Some chemicals will damage the pump valves if 

allowed to soak untreated for a length of time! ALWAYS 

flush the pump as instructed after each use. 

CAUTION: Care must be taken, being sure the handgun is 

secured in the operators hand. If this is not done a recoiling 

action may occur causing damage or personal injury. 

Winter Storage 

Drain all water out of your sprayer, paying special attention to the pump, handgun, and valve(s). These 

items are especially prone to damage from chemicals and freezing weather. 

The sprayer should be winterized before storage by pumping a solution of RV antifreeze through the 

entire plumbing system. This antifreeze solution should remain in the plumbing system during the 

winter months. When spring time comes and you are preparing your sprayer for the spray season, 

rinse the entire plumbing system out, clearing the lines of the antifreeze solution. Proper care and 

maintenance will prolong the life of your sprayer. 

13 

14 

2 

11 

9 

12 

7 

6 

11 

2 

5.1 

5 

3 

#5275495 (4101C-07) 

4-Roller Pump 

1 

4 10 

6 

8 

(*) = Parts available only in spare parts kit #7771796 

Page 2 

Item 

No 

1 

2 

3 

4 

5 

5.1 

6 

Part Number 

* 5072220 

* 5110052 

* 5112029 

--- 

0301-4101N 

0551-4000 

2220-0018 

Qty 

1 

2 

4 

1 

1 

1 

4 

Description 

O-Ring Gasket 

Seal (Viton) 

Super Roller (4-Roller Pump) 

Pump Model Sticker 

Rotor & Shaft Assembly 

Hollow Shaft (Only) 

End Plate Screw 

Item 

No 

7 

8 

9 

10 

11 

12 

13 

14 

Part Number 

5002351 

5017233 

5017480 

5017481 

5031113 

5055007 

5117049 

5117050 

Qty 

1 

1 

1 

1 

2 

1 

1 

1 

Description 

Body w/Seal 

End Plate 

Shaft Bearing Cover 

Bearing Cover 

Ball Bearing (Sealed) 

Collar 

Collar Set Screw 

1/4"-20 x 3/8" Set Screw

15 

23 

11 

24 

9 

10 

10 

28 

1 

7 

5 

25 

4 

21 

8 

27 

17 

6 

14 

14 

Plumbing 

Components 

4 

14 

7 

22 

27 

19 

20 

3 

17 

2 

3 

12 

8 

12 

26 

20 

13 

13 

5 

25.4 

25.3 

25.2 

25.1 

25.5 

25.6 

25.7 

21 

14 7 

18 

16 

11 

23 

Page 3 

Exploded View: 

SK-61-4R (5301336)

Parts List Model: SK-61-4R (5301336) 

Item 

No 

Part 

Number 

Qty Description 

1 5006259 4 3/8-16nc Hex Flanged Whiz Nut Gr. 5 



4 5010202 1 Poly Elbow, 1/2" MNPT x 3/8" HB 

5 5020233 1 Hose, 3/4"-2 Brd. x 20" 

6 5020527 1 Hose, 3/8"-1 Brd. x 25 Ft. 

7 5020530 1 Hose, 3/8"-1 Brd. x 51" 

8 5020544 1 Hose, 5/8"-1 Brd. x 10" 

9 5034101 4 H.H.C.S., 3/8"-16 x 1 3/4" 

10 5038698 4 Plastic Tank Hold-Down Leg Clip 

11 5038775 1 Handgun Bracket 

12 5051023 2 Hose Clamp, 5/8" 

13 5051024 2 Hose Clamp, 3/4" 

14 5051144 4 Hose Clamp, 3/8" 

15 5058188 1 Tank Lid w/Lanyard 

16 5075014 2 Rubber Grommet (Black) 

17 5095350 1 Manifold Mount (TR-40-GAS) 

Item 

No 

Part 

Number 


18 5117234 2 #10-24 x 1/2" Phillips Truss Head Machine Screw 

19 5117301 4 H.H.C.S. Flanged 1/4"-20nc x 1" Long 

20 5117323 6 H.H.C.S. Flanged 5/16"-18nc x 3/4" Long 

21 5152104 1 PowerPro 2.5 HP Engine (1/2" Shaft) 

22 5167004 1 Gauge, 0-200# (Dry) 

23 5169249 1 60 Gallon Elliptical Tank (White) 

24 5273959 1 Deluxe Pistol-Grip Handgun w/X-26 Tip 

25 5274939 1 Tank Valve Assembly 

25.1 5005196 1 Poly Adapter, 3/4" MNPT x 3/4" MGHT 

25.2 5143190 1 3/4" "T-800" Brass Ball Valve 

25.3 5011147 1 Poly Reducing Nipple, 3/4" MNPT x 1/2" MNPT 

25.4 5010243 1 Poly Street Elbow, (90 Deg) 1/2" MNPT x 1/2" FNPT 

25.5 5016066 1 Garden Hose Washer 

25.6 5149037 1 Poly Swivel, 3/4" Flat Seat Hose Barb 

25.7 5006209 1 Poly Knurled Swivel Nut, 3/4" FGHT 

26 5278023 1 Pump Assembly 

27 5278065 1 Valve Assembly 

28 5278083 1 60 Gallon Skid Weldment (Red) 

Pump Assembly #5278023 

8 

2 

9.1 

9.3 

9.2 

9.4 

3 

10 

5 

6 

4 

7 

4 

1 

Item 

No 

1 

2 

3 

4 

5 

6 

7 

8 

9 

9.1 

9.2 

9.3 

9.4 

10 

Part 

Number 

5006186 

5010249 

5011140 

5034604 

5038730 

5040004 

5067126 

5067127 

5116322 

5058125 

5072229 

5116323 

5046088 

5275495 


2 #10-24 Hex Whiz (Flange) Locknut 

1 45 Degree Poly Street Elbow, 3/4" NPT 

1 Poly Close Nipple, 3/4" MNPT 

2 5/16"-18 x 1/2" Hex Flanged Bolt (Grd. 5) 

1 Torque Bracket 

2 Rubber-Headed Machine Screw Bumper (#10-24) 

1 Poly Fitting, 3/4" MNPT x 5/8" HB 


1 3/4" Black Poly Strainer 

1 Strainer Bowl 

1 EPDM Gasket 

1 40 Mesh Screen 

1 Strainer Cap 

1 4-Roller Pump 

6 

Valve Assembly #5278065 

Item 

No 

20 

21 

22 

23 

24 

Part 

Number 

5010202 

5010206 

5067132 

5143199 

5143316 


1 Poly Elbow, 1/2" MNPT x 3/8" HB 

1 Poly Elbow, 3/4" MNPT x 3/8" HB 


1 Pressure Relief Valve, (3/4" NPT) 

1 Directo-Valve (AA6B) 

22 24 

23 

20 

21 

Page 4

'DIRECTO VALVE' - MANUALLY OPERATED CONTROL VALVE 

- Corrosion Resistant Materials: Wetted Parts 

Polypropylene, 316SS and Polyethylene 

- Maximum Pressure = 150 p.s.i. 

Closed (Bypass) 

13 Position 

- Large Capacity - 12.5 G.P.M. @ 5 p.s.i. Pressure Drop 

- 3/4" NPT (F) Inlet Connection 

- 1/2" NPT (F) Spray Line Connection 

- 3/4" NPT (F) Continuous By-Pass Connection 

- Valves may be connected w/close nipples for multiple 

section spray control 

3 

12 

4 

8 

Open 

Position 

11 

2 

9 

2 

1 

Part 

Number 

5143316 

5168718 

Mfg. Number 

AA6B 

PK-AB6B-KIT 

Description 

Control Valve 

Repair Kit (Marked **) 

7 

5 

6 

10 

Item 

No. 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 

13 

Part 

Number 

5002476 

5016280 

5019230 

5053091 

5078178 

5086043 

5101220 

5117281 

5132071 

** 

** 

** 

** 

Mfg Part Number 

CP36303-PP 

CP36307-PPB 

CP36306-302SS 

CP36309-302SS 

CP36301-NY 

CP36302-PP 

CP36308-SS 

CP38725-SS 

CP36304-SS 

CP7717-2/108-VI 

CP7717-2/209-VI 

CP38726-VI 

F14 

Qty 

1 

2 

1 

1 

1 

1 

1 

1 

1 

1 

1 

1 

1 

Description 

Poly Body (AA6B) 

Washer 

Spring 

Retaining Clip 

Handle (Gray) 

Poly Body Insert, (Black) 

Groove Pin 

#10-24 x 5/16" Phillips Truss Head Mach. Screw 

Stem 

O-Ring, Viton 

O-Ring, Viton 

Shut-Off Washer, Viton 

Pipe Plug, 1/4" MNPT 

PISTON TYPE PRESSURE RELIEF/REGULATING VALVES 

Bypasses excess liquid. Adjustable to maintain control of line pressure at any pressure within the valve operating range. 

Selected pressure setting firmly held in place by locknut. Extra large passages to handle large flows. 

- Polypropylene with stainless steel spring 

- Excellent chemical resistance 

- EPDM O-Rings 

- For pressure to 150 p.s.i. 

- 1/4" port for pressure gauge 

- Choice of 1/2" or 3/4" NPT (M) inlet & (F) outlet connections 

5 

9 

(10) 

1 

FIMCO 

Number 

5143199 

5143200 

3 

2 

Mfg Part NumberDescription 

23120-3/4-PP 

23120-1/2-PP 

3/4" Poly Valve 

1/2" Poly Valve 

5168717 PK-AB23120-KITRepair Kit, Items Marked ** 

8 

6 

7 

4 

Item 

No 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

Model 23120 

How to order: Specify valve number (Example: 23120-1/2-PP Polypropylene) 

Part 

Number 

5046270 

5108095 

5110266 

5115078 

** 

** 

** 

** 

--- 

--- 

Mfg Part Number5143199/Qty 

5143200/QtyDescription 

CP23122-NY 

CP23124-PP 

CP23123-PP 

CP23125-PP 

F14 

CP23126-302SS 

CP23127-302SS 

CP7717-15-EPR 

CP23121-PP 

CP23128-PP 

1 

1 

1 

1 

1 

1 

1 

1 

1 

- 

1 

1 

1 

1 

1 

1 

1 

1 

- 

1 

Adjusting Cap, Nylon (Gray) 

Spring Retainer 

Lock Ring 

Guide Seat 

Pipe Plug, 1/4" MNPT 

Retaining Pin 

Spring 

O-Ring, EPDM Rubber 

Poly Body (3/4" NPT) 

Poly Body (1/2" NPT) 

Page 5

Owner's Manual - FIMCO Industries

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