Toro 04130SL Rev C Service Manual Multi Pro 5700 D Preface Publication

Boom Actuator Service (Machines with Serial Numbers Above 260000000)
IMPORTANT: Do not dismantle, repair or modify the
boom actuator. Internal components  are not avail-
able for the  actuator. If an actuator  is damaged or
worn, replace actuator.
Actuator Air Bleeding
If actuator freeplay is excessive, air bleeding of the ac-
tuator should be  performed using the following proce-
dure:
CAUTION
1.  Thoroughly clean the exterior of actuator to prevent
contaminates from entering the actuator.
During and after operation, the actuator may be
very hot. To avoid possible burns, allow  the ac-
tuator to cool before working on it.
2.  Make sure that the actuator cylinder is fully retracted.
IMPORTANT: To prevent actuator damage, use vise
with protective jaws when clamping actuator.
Actuator Circuit Protection
3.
Place the actuator in a vise making sure that actuator
is clamped in the area identified in Figure  49. Use just
enough clamping  force to  hold the  housing securely.
Make sure that the reservoir plug is orientated up.
Each boom actuator is protected internally by a thermal
circuit breaker. In case of actuator overheating, the ther-
mal breaker will trip, causing the actuator to cease func-
tioning.   Once   the   actuator   cools   to    appropriate
operating temperature, the actuator thermal breaker will
reset to allow actuator operation to resume.
CAUTION
A separate 30 amp thermal breaker also protects each
boom actuator circuit.  These thermal breakers are  lo-
cated at the machine fuse panel and will prevent circuit
operation if overloaded. The thermal breakers reset au-
tomatically.
The actuator reservoir is pressurized. If the res-
ervoir  plug  is removed  too  quickly,  oil  under
pressure can be ejected from the actuator.
4.
Slowly loosen and remove the reservoir plug at the
top of the reservoir.
Actuator Freeplay Inspection
5.
Using a light through the plug hole, confirm that the
Over time,  actuator operation  may be  affected by air
captured in the reservoir oil. An excessive amount of air
in the actuator oil will allow excessive actuator freeplay.
Excessive  freeplay  will  allow  spray  boom  bouncing
when driving over severe terrain.
reservoir oil is  clear. If the oil appears  milky, air is en-
trained in  the reservoir  oil. Keep the  actuator vertical
with the plug removed for approximately 15 minutes to
allow the air to separate from the oil.
6.
ply to power the actuator and extend the cylinder com-
pletely.
When oil appears clear, use a 12 volt DC power sup-
Measure actuator  freeplay using  the following  proce-
dure:
1.
booms to the spray position.
Move the vehicle to an open area and lower the spray
IMPORTANT: To ensure proper reservoir  pressure,
make sure that  cylinder is extended before  instal-
ling reservoir plug.
2.
Lift up on the boom at the last triangular gusset with
a 25 pound (11.4 kg) force. Support boom in that posi-
tion.
7.
lb (5.1 to 6.8 N–m).
Install the reservoir plug and torque from 45 to 60 in–
3.
cylinder rod at the outside of the cylinder seal.
Using a non–permanent felt tipped marker, mark the
8.
tract and extend the actuator  cylinder 3 times. Repeat
steps 2 through 7 until oil is clear.
If reservoir oil was milky,  use power supply to con-
4.
Release the spray boom and allow it to return to the
spray (fully lowered) position.
9.
When  actuator  oil   is  clear  and   plug  has  been
installed, use power supply to fully contract the actuator
cylinder. Remove actuator from vise and install on ma-
chine.
5.
Determine the  actuator freeplay by  measuring the
distance from the mark on the cylinder rod to the cylinder
seal. The freeplay should be less than 0.100” (2.5 mm).
If excessive freeplay is found, bleed air from actuator.
Spray System
Multi Pro 5700–D
Page 6 – 48     Rev. A
Product Specification
CategoriesLawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals
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- 212 pages
Document TypeCatalog
LanguageEnglish
Product BrandToro. Customer Service Representatives are available by phone: Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
Canada 1-888-225-4886 USA 1-888-384-9939, Lawn Mower
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Publishertoro.com
Wikipedia's PageToro Company
CopyrightAttribution Non-commercial
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