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 the actuator to pre-
vent 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 55. 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
Workman 200 Spray System
Page 3 – 50 Rev. A
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro 200 |
| Download File |
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| Document Type | Service Manual |
| Language | English |
| Product Brand | Toro. 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 |
| Document File Type | |
| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
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