diamond mowers FD Series Guide
DIAMONDMOWERS.COM
MAINTENANCE
07/29/2022
WARRANTY + SERVICE 888.960.0364
PARTS 888.960.0361
FD SERIES
DRUM MULCHER
1082300001 REV 1
DRUM MULCHER MAINTENANCE SCHEDULE............................................................................................... 4
MAINTENANCE INTERVALS ................................................................................................................................................ 4
MOTOR TUNING ...................................................................................................................................................... 5
VALVE BLOCK SCHEMATIC.................................................................................................................................................. 5
TOOTH AND TOOTH HOLDER MAINTENANCE................................................................................................ 6
TEETH..........................................................................................................................................................................................6
REPLACING TOOTH HOLDERS.............................................................................................................................................7
BELT AND PULLEY MAINTENANCE.................................................................................................................... 8
PULLEY AND BELT INSPECTION........................................................................................................................................8
BELT INSPECTION..................................................................................................................................................................8
PULLEY INSPECTION ............................................................................................................................................................9
BEARING MAINTENANCE.................................................................................................................................. 10
GREASING BEARINGS.........................................................................................................................................................10
BEARING INSPECTION.......................................................................................................................................................10
SKID SHOE MAINTENANCE ...............................................................................................................................11
SKID SHOE REPLACEMENT................................................................................................................................................11
DRUM MAINTENANCE ........................................................................................................................................ 12
DRUM MOTOR BOLT MAINTENANCE............................................................................................................. 13
SAFETY POLYCARBONATE MAINTENANCE.................................................................................................. 14
SAFETY POLYCARBONATE CLEANING ........................................................................................................................... 14
HOSE MAINTENANCE.......................................................................................................................................... 15
HOSE AND FITTINGS........................................................................................................................................................... 15
QUICK DISCONNECT COUPLERS .................................................................................................................................... 15
HOSE POSITION.................................................................................................................................................................... 15
TROUBLESHOOTING ............................................................................................................................................ 16
TROUBLESHOOTING............................................................................................................................................................16
APPENDIX ................................................................................................................................................................17
REPLACEMENT PARTS.........................................................................................................................................................17
30” ASSEMBLIES .................................................................................................................................................................18
50” ASSEMBLIES .................................................................................................................................................................24
DECAL INSTALLATION ....................................................................................................................................................... 30
BOSS FITTINGS ....................................................................................................................................................................32
TORQUE SPECS .................................................................................................................................................................... 33
TABLE OF CONTENTS
TABLE OF CONTENTS
© Diamond Mowers®, LLC
DRUM MULCHER MAINTENANCE SCHEDULE
Regular maintenance ensures the unit stays productive for a long time. The table below is the minimum maintenance and
inspection intervals.
MAINTENANCE INTERVALS
Procedure 10 Hours/Daily 50 Hours/Weekly 150 Hours As Needed
Bearings Grease Inspect
Belt and Pulleys Inspect
Drum Inspect
Hoses Inspect Inspect Replace
Hydraulic and Hose
Fittings
Inspect
Motor Bolts Inspect
Couplers Inspect
Safety Polycarbonate Inspect Clean
Skid Shoes Inspect Replace
Teeth Inspect Replace
Tooth Holders Inspect Replace
1102000012 Rev 1 07/05/2022
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© Diamond Mowers®, LLC
MOTOR TUNING
The motor must be tuned by the dealer or end user when first installed and if the mulcher is experiencing issues with
mulching. Order the Two Speed Motor Tuning Kit from www.diamondmowers.com or from an authorized Diamond Mowers
dealer.
VALVE BLOCK SCHEMATIC
The valve block schematics below can be used to assist in advanced troubleshooting.
1102000013Rev 1 07/05/2022
5000 PSI - Part Number 39-0140
3000 PSI - Part Number 39-0141
5
© Diamond Mowers®, LLC
TOOTH AND TOOTH HOLDER MAINTENANCE
Inspect teeth and tooth holders every 10 hours or daily for:
•chips.
•damage.
•missing points.
•loose hardware.
If damage is found, the sections below outline options to address the issue.
TEETH
LOOSE HARDWARE
Use a torque wrench to tighten the hardware to 120ft-lbs (163Nm).
ROTATING TEETH
On four-point steel teeth and twin chisel planer teeth, the tooth can be rotated 180° to expose fresh points.
SHARPENING TEETH
On four-point steel teeth and twin chisel planer teeth, the tooth points/edges can be sharpened using an angle grinder
with a 4.5” flap style sanding disc.
If the tooth will no longer take a point/edge, replace the tooth.
REPLACING TEETH
If necessary, replace the teeth with Diamond replacement teeth. To replace teeth:
1. Remove the bolt and flat washer on the existing tooth.
2. Install the new tooth.
3. Hand-thread the bolts and washers into the tooth.
4. Tighten the hardware to 120ft-lbs (163Nm).
Note: Do not apply Loctite or lubricant to the hardware. Do not over tighten as this will strip the threads.
1102000014 Rev 1 07/05/2022
Bolt
Washer
Tooth
Tooth
Holder
6
© Diamond Mowers®, LLC
REPLACING TOOTH HOLDERS
The following must be completed by a qualified welder.
1. Grind away the welds securing the tooth holder to the drum.
2. Remove the old tooth holder.
3. Clean the surface of the drum where the old tooth holder was located.
4. Position the new tooth holder using the locating pin.
5. Weld the new tooth holder on to the drum.
Note: Only ground the welder to the drum. Grounding on the deck shell while welding the drum causes the welders
current to run though the bearings and will cause damage. This will null and void any warranty.
7
© Diamond Mowers®, LLC
BELT AND PULLEY MAINTENANCE
PULLEY AND BELT INSPECTION
Inspect the belt and pulleys every 150 hours or monthly.
BELT INSPECTION
Remove the belt access side cover and inspect the belt for:
•proper tension by pushing up and down on the belt. When cold, belt movement must have 1.825 to 1.25””deflection.
•damage.
BELT TENSIONING
If belt tension must be adjusted:
1. Slightly loosen the motor plate bolts.
2. Loosen the lock nut on the tension adjustment bolt.
3. Screw the tension adjustment bolt in or out to adjust the tension.
4. Tighten the lock nut.
5. Install and tighten the motor plate bolts.
6. Inspect the belt again for deflection.
7. Re-tighten the lock nut on the tension adjustment bolt.
1102000015 Rev 1 07/08/2022
Tension
Adjustment
Bolt
8
© Diamond Mowers®, LLC
PULLEY INSPECTION
With the mulcher sitting on level ground, use a level to confirm the motor pulley is aligned with the drive pulley.
PULLEY ADJUSTMENT
1. Remove the motor pulley set screws.
2. Thread a set-screw into the unlocking hole until the taper-lock clamp opens slightly.
3. Gently tap on the taper-lock and motor pulley in the desired amount and direction on the splined motor shaft.
4. Without moving the motor pulley or the taper lock, thread in the set screws.
5. Refer to product specific drawings for torque specifications.
6. Check the alignment.
Motor Pulley
Set Screws
Unlocking
Hole
Vertical
Pulley
Alignment
9
© Diamond Mowers®, LLC
BEARING MAINTENANCE
GREASING BEARINGS
Grease the bearings every 10 hours or daily when the bearings are warm.
1. Grease the bearing zerks with synthetic/blend #2 lithium based grease a minimum of one pump per hour of operation.
BEARING INSPECTION
Inspect the bearings every 50 hours or weekly by rotating the drum while simultaneously pushing the drum sideways.
If excessive side to side play (greater than 0.65”) is detected during inspection, order replacement bearings from www.
diamondmowers.com or an authorized Diamond Mowers dealer and replace according to the instructions provided with
the bearings.
1102000016 Rev 1 07/25/2022
Grease
Locations
10
© Diamond Mowers®, LLC
SKID SHOE MAINTENANCE
Inspect skid shoes every 50 hours or weekly for:
•cracks.
•excessive wear.
•damage.
Replace as needed.
SKID SHOE REPLACEMENT
1. Cut the stitch welds securing the skid shoes.
2. Stitch weld the new skid shoes in the existing skid shoe location.
3. Paint any exposed metal.
1102000017 Rev 1 07/05/2022
Skid Shoe
Stitch Weld
11
© Diamond Mowers®, LLC
DRUM MAINTENANCE
Inspect the drum every 10 hours or daily for:
•cracks.
•damage.
If damage is found, replace the drum. Order a new drum from www.diamondmowers.com or from your local Diamond
dealer.
1102000018 Rev 1 07/05/2022
12
© Diamond Mowers®, LLC
DRUM MOTOR BOLT MAINTENANCE
Remove the motor top and side access covers and inspect the motor bolts every 50 hours or weekly for:
•damage.
•tightness.
•missing bolts.
If damage is found, replace the bolts as needed with parts ordered from www.diamondmowers.com or from the local
Diamond Mowers dealer.
1102000021 Rev 1 07/05/2022
Motor Bolts
13
© Diamond Mowers®, LLC
SAFETY POLYCARBONATE MAINTENANCE
Inspect the polycarbonate every 10 hours or daily for:
•cracks.
•loose hardware.
•damage.
Replace as needed with parts ordered from www.diamondmowers.com or from the local Diamond Mowers dealer.
SAFETY POLYCARBONATE CLEANING
Clean the safety polycarbonate using mild soap, water, and a soft cloth as needed. Cleaning with common glass cleaners
can scratch the polycarbonate.
1100000001Rev 1 07/05/2022
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© Diamond Mowers®, LLC
HOSE MAINTENANCE
HOSE AND FITTINGS
Inspect hydraulic hoses and fitting every 10 hours or daily for:
•hydraulic fluid around fittings.
•fluid leaks.
•abrasions or cuts.
FLUID LEAKS
If a fluid around the fitting or a leak is detected:
1. Immediately stop operating.
2. Replace damaged/worn hoses.
3. Apply hose wrap around critical pinch and rub points.
4. Top-off fluid level.
QUICK DISCONNECT COUPLERS
Inspect connections for:
•leaks.
•damage.
Replace as needed.
HOSE POSITION
Inspect the hose carrier every 50 hours or weekly to ensure the hose bundle sits between 2” and 3” above the top of the
deck and allow a full range of motion. Adjust as needed.
1100000002 Rev 1 07/05/2022
15
© Diamond Mowers®, LLC
TROUBLESHOOTING
This section provided general troubleshooting steps. If the steps in this section do not address the issue, call Diamond
Mower’s Customer Service at 1-888-960-0361.
TROUBLESHOOTING
Problem Potential Cause Solution
Drum Will Not Spin No hydraulic flow from the machine. Verify hydraulic flow from the power unit.
Belt is broken. Replace the broken belt.
Belt is loose. Tighten the loose belt.
Reverse flow from the machine. After connecting the hoses to the machine:
•start the machine at low idle. Verify the drum is
spinning correctly. If the drum is not spinning
correctly, reverse the pressure and low flow
hoses are connected correctly.
Hydraulic motor failure. Replace the hydraulic motor. Contact Diamond
Mowers for the replacement part.
Seized bearing. Replace the bearings.
Sheared pulley key. Replace the sheared pulley key and reinstall the
pulley. Align the pulley with the other pulley using a
straight edge.
Material jammed. Dislodge material from the drum by:
•disengaging then backing the implement up.
•using tools to dislodge and remove material.
Can Not Cut Large
Trees
Machine operating on low flow. Ensure the machine is operating on high flow.
Drum not allowed enough recovery time
between cuts.
Allow the drum to run up to full speed between cuts
on larger trees.
Worn or missing teeth. Inspect and sharpen/replace teeth as needed.
Variable displacement motor not tuned. Ensure the motor is tuned to the carrier PSI rating.
Excessive Vibration Vegetation build up on drum or cutting
teeth.
Dislodge material from the drum by:
•disengaging then backing the implement up.
•using tools to dislodge and remove material.
Missing teeth. Inspect for missing teeth and replace as needed.
Missing tooth holder. Install a new tooth holder if required.
Excessive play in the drum. Check for and, if required, replace worn bearings.
Check for a loose stub shaft. If necessary, use
Loctite and torque the stub shaft to 240ft-lbs
(325Nm).
1102000010 Rev 1 06/30/2022
16
© Diamond Mowers®, LLC
APPENDIX
This section contains supplemental quick guides and drawings with part numbers.
Use these drawings to determine the part numbers when ordering parts.
REPLACEMENT PARTS
When replacing parts, use Genuine Diamond Parts.
Call: 1-888-960-0361 or 1-605-977-3300
Email: Parts@diamondmowers.com
Order Online: www.diamondmowers.com
1100000003 Rev 1 07/05/2022
17
© Diamond Mowers®, LLC
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Table of contents
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