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Maintenance - Introduction

To retain the quality of the mower, use genuine replacement
parts only. Contact a local dealer for parts and service
assistance. For the correct part or information for a
particular mower, always mention the model and
serial number.

Service - After First 5 Hours

Change Engine Oil

1. Refer to the Engine Manual for proper oil specifications,

procedures and proper service intervals.

2. For the simplest/cleanest oil change, simply turn the

mower on its side to drain the oil, as shown. Drain the
oil through the dipstick tube (A, Figure 14) into a
container. Allow sufficient time for all the oil to drain. 

Important: Drain the fuel tank before tipping the machine.
DO NOT tip the machine with the carburetor or spark plug
down. Oil from the crankcase will saturate the air filter and
cause the engine to be hard to start or not start at all.  If
contamination does occur, the air filter will have to be
replaced.

3. Dispose of drain oil properly.
4. Fill the engine with oil as specified in the Engine Manual.

Do not overfill.

Check Grease Level in Transmission

1. Remove the transmission fill plug (A, Figure 15).  Roll

the machine forward or backward while looking down
into the plug hole.

2. If liquid grease is not visible on the input gear (the small

gear below the plug hole), add an amount, to cover the
gear, of Snapper “00” grease.

Note: Snapper “00” grease (Part No. 7029443) is available at
your dealer.

Note: Do not spill grease or oil onto the surface of the drive
disc (A, Figure 16).

3. Reinstall the transmission plug.
4. Check the grease level after each 25 hours of operation.

Important: Drain the fuel tank before tipping the mower. DO
NOT tip the machine with the carburetor or spark plug down.
Oil from the crankcase will saturate the air filter and cause
the engine to be hard to start or not start at all. If
contamination does occur, the air filter will have to be
replaced.

Figure 14: Draining the engine oil 

WARNING

DO NOT attempt any maintenance, adjustments or service
with engine and blade running. STOP engine and blade.
Disconnect spark plug wire and secure away from spark
plug. Engine and components are HOT. Avoid serious
burns, allow sufficient time for all components to cool.
Wear heavy leather gloves when handling or working
around cutting blades. Blades are extremely sharp and can
cause severe injury.

!

!

A

Figure 15: Removing the transmission fill plug

A

Figure 16: Location of the drive disc

A

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Maintenance

Not 

for  

Reproduction

Summary of Contents for 7800764

Page 1: ...Operator s Manual 7104669 Rev 21 STEEL DECK WALK MOWERS COMMERCIAL MODELS SERIES 20 Model No Description 7800764 CRP218520 7800772 CP218520 N o t f o r R e p r o d u c t i o n...

Page 2: ...operate this equipment Save these original instructions for future reference Complete the following information on your Snapper purchase Date of Purchase______________________________________________...

Page 3: ...Periodic 13 Engine 13 Air Filter 13 Engine Oil 13 Storage Procedure 13 Mower Blade Replacement 14 Blade Sharpening 14 Wheel Drive Control Adjustment 15 Driven and Drive Disc Service 16 Belt Service 1...

Page 4: ...ons and warnings in this manual and on the mower engine and attachments Know the controls and the proper use of the mower before starting 2 Only mature responsible persons shall operate the machine an...

Page 5: ...peration Continued From Previous Column 13 DO NOT operate mower without the entire grass catch er or guards in place discharge guard rear guard or other safety devices in place and working DO NOT poin...

Page 6: ...act your dealer if you have questions A Oil Fill Cap and Dipstick B Fuel Filler Cap C Mulching Cover D Rear Height Adjustment Latch 2 E Front Height Adjustment Latch 2 F Blade Control G Rope Start Han...

Page 7: ...Figure 2 is tightened after fueling Refer to the Engine Owners Manual for fuel specifications 6 Clean the exterior surfaces of the cutting deck and engine of any accumulation of spilled fuel dirt gra...

Page 8: ...le Height Adjustment For greater operator comfort the height of the mower handle can be adjusted 1 Loosen the lower nuts A Figure 5 on each lower handle 2 Move the handle assembly B up or down until t...

Page 9: ...notch lower than the front wheel latches to improve mulching performance Note The mulching cover should remain on the machine at all times unless alternate discharge operations are desired such as sid...

Page 10: ...ver the stud where the front of the mulching cover was originally secured The slot C on top of the adapter slips under the restraining nut on top of the deck under the right front corner of the engine...

Page 11: ...ure 13 off of the Z fold at the rear of the bag B 3 To close the bag fold the rear of the bag into the former Z shape keeping the edges aligned Grasp the edge of the Z fold and while holding the slide...

Page 12: ...orward or backward while looking down into the plug hole 2 If liquid grease is not visible on the input gear the small gear below the plug hole add an amount to cover the gear of Snapper 00 grease Not...

Page 13: ...the engine owner s manual for service instructions Storage Procedure Refer to the Engine Owner s Manual for directions regarding engine storage preparations Prepare the mower for end of season storage...

Page 14: ...turate the air filter and cause the engine to be hard to start or not start at all If contamination does occur the air filter will have to be replaced 3 Remove the blade B Figure 20 WARNING DO NOT att...

Page 15: ...tend or shorten the spring length 3 Rehook the upper spring to the cable eye and check clearance Repeat the procedure if required Note The vinyl spring cover B should be kept over the spring at all ti...

Page 16: ...n cloth Drive Spring Repair Replacement If the drive spring A Figure 24 is loose reconnect If the spring is broken replace with a new spring Note Use a pair of needle nose pliers to install the drive...

Page 17: ...sition then back to the fast position Recheck the 1 8 measurement described previously Readjust as needed Tighten the nut when finished 7 Reinstall the driven disc spring to the driven disc assembly D...

Page 18: ...ing A Figure 31 that secures the driven disc hub B to the thrust plate 3 Slide the driven disc hub out of the bearing C 5 Remove the four screws and replace the bearing 6 Reassemble the components in...

Page 19: ...C The drive disc powers the poly v belt which engages the transmission that powers the rear wheels Should these belts become worn they could cause slippage which would impair mower performance The co...

Page 20: ...0 Reinstall the drive disc and retaining hardware IMPORTANT 1 The square shoulder of the drive disc bolt must fit into the square hole of the bushing 2 The square end of bushing must fit into the brac...

Page 21: ...ling System Clean Shroud Fins Engine Manual X Drive Belts Check for Wear and Tension Page 13 19 X X X Mower Blade Check for wear Damage Replacement Page 14 X Mower Deck Clean Debris Accumulation Page...

Page 22: ...Of Traction 1 Build up of debris on or around wheel drive components 1 Clean debris 2 Driven disc slipping 2 Clean or replace driven disc 3 Drive belt requires replacement 3 Replace drive belt 4 Dama...

Page 23: ...arranty service is requested the manufacturing date of the product will be used to determine warranty eligibility ABOUT YOUR WARRANTY We welcome warranty repair and apologize to you for being inconven...

Page 24: ...www snapper com 24 Notes N o t f o r R e p r o d u c t i o n...

Page 25: ...25 Notes N o t f o r R e p r o d u c t i o n...

Page 26: ...www snapper com 26 Notes N o t f o r R e p r o d u c t i o n...

Page 27: ...27 Slope Guide N o t f o r R e p r o d u c t i o n...

Page 28: ...the wide array of prod ucts on which engines are placed the gas engine may not develop the rated gross power when used in a given piece of power equipment This difference is due to a variety of factor...

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