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QC620
Skid Digger

Service and Maintenance

27

8.2  Maintenance Schedule

Perform maintenance procedures at time shown or hour 
interval, whichever comes first.

As Required Maintenance

Remove any entangled material.

Every 8 hours of operation or daily

Grease the skid digger.

See 

page 27.

Check that all fasteners are tight.

See 

page 31.

Check the condition of all hydraulic lines, 
hoses, and fittings. Replace any that are 
damaged. Reroute those that are rubbing, 
pinched, or crimped. Tighten any fitting 
that is leaking. Ensure fittings are clean 
and free of dirt.

See 

page 32

.

Every 50 hours of operation or weekly

Check condition of bucket teeth. Replace, 
if required.

See 

page 28

.

Every 100 hours of operation or annually

Clean—remove any entangled material or debris build-up.

8.3  Grease Points

Look for this decal on the skid digger. It indicates a grease point 
and the number of hours between greasing.

For the grease point locations, see the following image (

Fig.  10 – 

Grease points on page 27

). Look for the following symbol, 

which indicates the number of grease points at each location.

4

Use an SAE multi-purpose high temperature grease with 
extreme pressure (EP) performance. Also acceptable is an SAE 
multipurpose lithium-based grease.

Grease the skid digger regularly to keep it working efficiently and 
extend its life.

• 

Use a hand-held grease gun. Typically, two applications per 
fitting is enough; however, pump grease until it is visible at 
the joint.

• 

Wipe off grease fittings with a clean cloth before greasing 
to avoid injecting dirt and grit.

• 

If fittings do not take grease, remove, and clean them 
thoroughly. Replace grease fittings, as required.

• 

Immediately replace or repair grease fittings that are not 
working correctly.

Always grease the skid digger after pressure-washing it.

Fig.  10 – 

Grease points

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Summary of Contents for QC620

Page 1: ...OPERATOR S MANUAL Skid Digger QC620 Document Number Z97125_En Rev May 2021...

Page 2: ...nd can be mounted to any regular size skid steer model Keep this manual handy for reference Pass it on to new operators or owners as required Contact your local Wallenstein dealer or distributor for a...

Page 3: ...r 17 4 2 Operator Orientation 17 4 3 Skid Digger Components 18 5 Installation 19 5 1 Equipment Matching 19 5 2 Attach to a Skid Steer 19 5 3 Remove from a Skid Steer 20 6 Controls 21 7 Operation 22 7...

Page 4: ...el Serial Number Delivery date I have thoroughly instructed the customer about the equipment care adjustments safe operation applicable warranty policy and reviewed the manuals with them Dealer Addres...

Page 5: ...t when ordering parts or requesting service or other information The product information plate location is shown in the following illustration Record your product Model and Serial Number in the follow...

Page 6: ...s on a black background This type of decal explains the operation of a control Product Decals indicate machine model and serial number and other important information VIN NLV MODEL Manufactured by Wal...

Page 7: ...d to alert against unsafe practices CAUTION Indicates a potentially hazardous situation that if not avoided may result in minor or moderate injury It may also be used to alert against unsafe practices...

Page 8: ...uld the need arise and know how to use it Do not allow long hair loose fitting clothing or jewelry near the equipment Know how to stop the equipment quickly in the event of an emergency For instructio...

Page 9: ...in a Safe Condition For instructions see Safe Condition on page 9 2 8 Operating Safety Wear appropriate PPE when using or servicing this machine This includes but is not limited to A hard hat Hearing...

Page 10: ...work underneath equipment unless it is securely supported by blocks Always wear the appropriate PPE When replacement parts are required only use genuine original equipment manufacturer OEM parts Walle...

Page 11: ...on set up a Work Zone around the area where hazards are present Mark the area with safety cones The area outside of the work zone is considered a designated Safe Zone for other workers or bystanders A...

Page 12: ...QC620 Skid Digger Safety 12 1 2 3 4 10 ft 3 m 10 ft 3 m 10 ft 3 m 10 ft 3 m 01662 Fig 2 Establish a work zone perimeter 1 Safe zone 2 Work zone 3 Safety cone one of eight 4 Back up space and turning...

Page 13: ...his training the sign off sheet provided below can be used Make periodic reviews of Safety and Operation a standard practice for all operators Review again at the startup of every season The design an...

Page 14: ...ecome familiar with each warning and the machine function related to that area Think SAFETY Work SAFELY IMPORTANT If safety signs have been damaged removed become illegible or parts replaced without s...

Page 15: ...ctrical conduit Have an underground utility locating marking service survey the area before digging 4 Lock Pins Warning Make sure lock pins are securely latched before using the equipment Failure to s...

Page 16: ...tion area must be clean and dry The application surface must be clean and free of grease or oil The ambient temperature must be above 50 F 10 C A squeegee plastic bank card or similar tool is required...

Page 17: ...ructions in conjunction with a good maintenance program your skid digger can provide many years of trouble free service IMPORTANT Make sure all operators understand how to put the skid steer and skid...

Page 18: ...Skid Digger 18 01670 1 2 3 4 5 6 Fig 5 Skid Digger Components 1 Hydraulic cylinder 2 Hydraulic connections 3 Skid steer mount 4 Main frame and boom 5 Bucket and linkage 6 Operator s Manual tube 4 3 S...

Page 19: ...er quick attach hitches See the skid steer operator s manual for specific mounting instructions 1 Clear the area of bystanders 2 Make sure that there is enough room and clearance to safely drive the s...

Page 20: ...the skid steer engine Move the bucket tilt control lever several times to relieve any trapped pressure in the circuit 4 Place planks or blocks under the bucket boom and base Make sure the skid digger...

Page 21: ...s Use the skid steer hydraulic controls to operate the skid digger Read and understand the controls section of the skid steer operator s manual Before using the skid steer be familiar with the locatio...

Page 22: ...ys the risk of someone getting in the way or getting pinched caught by components Do not resume work until the work zone is clear Do not try to lift objects that are beyond the lifting limits of the m...

Page 23: ...way from utility lines and obstructions Be aware of overhead hazards Always have an underground utility locating marking service survey the area before digging Use extreme caution when excavating on a...

Page 24: ...ll dirt into a hole or trench Pull dirt into a hole or trench 1 Position the bucket behind the dirt pile with the hole or trench in front Make sure the skid steer does not get too close to the excavat...

Page 25: ...ll not be used for an extended length of time disconnect it from the skid steer and place it in storage Repair or replace any worn or damaged components to prevent any unnecessary down time at next us...

Page 26: ...ighten all bolts nuts and screws Reinstall all safety shields and covers after completing service or maintenance Use regular cleaners to clean parts Do not use gasoline Always use the correct tools fo...

Page 27: ...on the skid digger It indicates a grease point and the number of hours between greasing For the grease point locations see the following image Fig 10 Grease points on page 27 Look for the following s...

Page 28: ...the bucket is resting on the ground Make sure the boom cannot move unexpectedly when the pins are driven out 1 Remove retaining bolts and nuts that secure the pins 2 Carefully drive the pins out If th...

Page 29: ...k valve stuck Clean or replace Engine speed too slow Increase engine speed to correct rpm Cylinder movements jerky Hydraulic system leak Air in hydraulic system Tighten all hydraulic connections Cycle...

Page 30: ...ine inch bucket Three teeth 0 8416 cubic ft volume 12 inch bucket Three teeth 1 2 cubic ft volume 15 inch bucket Four teeth 1 5 cubic ft volume 18 inch bucket Four teeth 1 8 cubic ft volume 24 inch bu...

Page 31: ...rease torque values by 5 Bolt grades are identified by their head markings Imperial Bolt Torque Specifications Bolt Diameter Torque Value SAE Gr 2 SAE Gr 5 SAE Gr 8 lbf ft N m lbf ft N m lbf ft N m 1...

Page 32: ...and tighten the swivel nut with the second Torque to values shown If a torque wrench is not available use the FFFT Flats From Finger Tight method Hydraulic Fitting Torque Tube Size OD Hex Size Across...

Page 33: ...lude the original purchase receipt with any claim This warranty does not cover the following 1 Normal maintenance or adjustments 2 Normal replacement of wearable and service parts 3 Consequen al damag...

Page 34: ...ance Safety 10 26 Maintenance Schedule 27 As required 27 Every 8 hours or daily 27 Every 50 hours or weekly 27 Every 100 hours or annually 27 O Operating Safety 9 Operation 22 Before Startup 22 Diggin...

Page 35: ...28 Set Up a Work Zone 11 Skid Digger Components 18 Skid steer Attachment weight 19 Horsepower 19 Hydraulic system 19 Specifications 30 Accessories 30 Common Bolt Torque Values 31 Equipment Specificat...

Page 36: ......

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