Section 4: Maintenance & Lubrication
Table of Contents
4/5/19AP-SRF2772, AP-SRF2790, AP-SR2772, & AP-SR2790 Powered Rakes 321-120MK
28
Maintenance
Proper servicing and adjustment are key to the long life of
any attachment. With careful and systematic inspection,
you can avoid costly maintenance, time, and repair.
After using your Powered Rake for several hours, check
all bolts to be sure they are tight. Replace any worn,
damaged, or illegible safety labels by obtaining new
labels from your Kubota dealer.
To avoid serious injury or death:
Always secure equipment with solid, non-concrete supports
before working under it. Never go under equipment supported
by concrete blocks or hydraulics. Concrete can break,
hydraulic lines can burst, and/or hydraulic controls can be
actuated even when power to hydraulics is off.
To avoid serious injury or death:
• Always shut power machine down using the “Shutdown
Procedure” provided in this manual before servicing,
adjusting, cleaning, or maintaining the attachment.
• Allow only persons to perform maintenance on this
attachment who have been properly trained in its safe
operation.
• Do not alter attachment or replace parts on the attachment
with other brands. Other brands may not fit properly or
meet OEM specifications. They can weaken the integrity
and impair the safety, function, performance, and life of the
attachment. Replace parts only with genuine OEM parts.
• Check hitch fit-up frequently. An improper fit-up can cause
the attachment to come loose from the loader hitch plate
and fall.
• Check hydraulic hoses and fittings frequently for leaks or
damage. Fluid escaping under pressure can penetrate skin.
Large leaks can drop the attachment.
• Perform scheduled maintenance. Check for loose
hardware, missing parts, broken parts, structural cracks,
and excessive wear. Make repairs before putting the
attachment back into service. Serious breakdowns can
result in injury or death.
• Backup alarm must be in good working order to warn
others. Use a backup camera or rear-view mirror that is in
good condition to help see undesirable situations behind the
unit. Drive at a slower speed to compensate for blind spots.
IMPORTANT: If chaincase and/or sprocket shafts
are disassembled, it may be necessary to shim
between the chaincase and frame tube during
reassembly to properly realign the sprocket shafts.
Shim Pack 314-254A may be purchased from your
nearest Kubota dealer for this purpose.
Drive Chain Inspection
Refer to Figure 4-1 on page 29:
The operator should check chain tightness after initial
run-in and periodically thereafter to make sure that the
drive chain is tensioned correctly.
1. Check chain tension by removing hex bolts (#1), lock
washers (#2), and access cover (#3) from chaincase
main cover (#6).
2. Inspect double chain (#14) for tightness and excess
wear. Replace worn out chain. See “Sprocket and
Chain Replacement” on page 28.
3. If chain should become loose, either spring (#15) or
double chain (#14) needs to be replaced. See
“Sprocket and Chain Replacement” on page 28.
4. Apply 1/8" bead of sealant (Part No. 821-049C) to the
main cover (#6) where its surface makes contact with
access cover (#3). Install access cover (#3) and
secure with lock washers (#2) and 1/4"-20 x 5/8" GR5
hex bolts (#1). Torque hex bolts to the correct torque.
Sprocket and Chain Replacement
Refer to Figure 4-1 on page 29:
1. Place an oil catch pan under the chain case.
1. Remove 1 1/4" long hex socket cap screws (#4) and
1 1/2" long hex socket cap screws (#5).
2. Remove main cover plate (#6).
3. Loosen chain tension by removing spring (#15) from
idler arms (#13).
4. Remove roller chain (#14). Inspect roller chain for
wear and replace if needed.
5. If top sprocket (#11) needs replacing, remove
bolt (#7), lock washer (#8), special flat washer (#9),
and sprocket (#11).
6. Install new sprocket (#11) on hydraulic motor output
shaft. Secure sprocket with special flat washer (#9),
lock washer (#8), and 3/8"-16 GR5 bolt (#7). Tighten
bolt to the correct torque.
7. If bottom sprocket (#16) needs replacing, remove
nut (#17) and sprocket (#16).
8. Install new sprocket (#16) on roller input shaft and
secure with 1 1/8”-12 nylon insert jam nut (#17).
Tighten nut to the correct torque.
9. Install new/existing double roller chain (#14) making
sure it is over sprocket (#11), under sprocket (#16),
and between the two idler rollers (#13).
10. Install spring (#15) by attaching it to both ends of idler
arms (#13).
11. Turn rake roller several turns and observe chain to
make sure everything is working properly.
NOTE: Oil in chaincase! Be prepared to capture oil
when taking off main cover (#6).
Section 4: Maintenance & Lubrication
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