Alamo HYDRO 15 - Manual (Page 40)

HYDRO 15 (Service Manual) 09/06
© 2006 Alamo Industrial Section 3 - 2
Recommended Reading Before any Service Work Begins:
1. Read this section completely before starting inspection or repair to the mower hydraulic system to become
familiar with its components.
2. Identify the model of the mower model number, serial number and other information that may be needed
to identify which components or options that may be on the mower.
3. Make certain the mower and tractor are secured in a safe and proper parked position, hydraulic (axle and
wings) lowered. Tractor safely parked according to tractor manufacturers recommendations.
4. Clean the complete hydraulic system in the area of the repairs. Dirt is the enemy of all hydraulic systems
and all steps must be taken to keep hydraulic system from being contaminated.
5. Make certain the hydraulic oil is not hot from being operated or tested. All hydraulic components (including
hydraulic oil) temperature should not exceed ambient temperatures. If temperature is high it must be allowed top
cool before attempting any repairs of the hydraulic system. Caution should be taken, if mower is sitting in hot
sun on a very hot day the temperature of the metal and oil can be hot, test the temperature.
6. The drawing and illustrations in this section are to help understand the components of the pump. This section
is not intended to be a parts manual or operators manual although it is intended to be used with the other manuals.
7. Use caution if clamping any pump components in a vise or gripping them with any type of tools. The
jaws of a vise can damage the surface or it the shape of a component, tools can scratch or damage the surface
to render the component un-serviceable
8. These pumps are designed to be assembled to be turned in the direction for which they were built, clockwise
or counter clockwise. When the pump is dis-assembled it is very important that you take notice of which
components are where and which way they are installed in pump (example Item 5). If these pumps are installed
with component in the wrong place and then turned in the wrong direction the pressure will usually blow the input
seal out and may damage other components.
9. When making repairs always make certain that the cause of the failure is identified and repaired. Sometimes
the cause of the failure is not corrected and another failure occurs rapidly because the cause of the failure is still
there.
10. Make certain to use drain pans to catch all oil that may leak out during the testing and/or repair steps. Make
certain to keep all hydraulic opening plugged or capped during repairs.
11. Never start the tractor and engage PTO to turn pump, if any hydraulic components have been removed or
disconnected, line blockage or oil diverted to the wrong place could to extreme damage to the hydraulic system
and/or to the mower deck cooling tubes.
12. The pressure side of the pump hydraulic flow MUST NEVER be sent directly to the deck cooling tubes as
the excess pressure will damage them. The hydraulic oil flow can only be sent through the deck cooling tubes
when it is being returned to the tank with little or no resistance.
13. Some components of hydraulic system are not meant the be repaired, only replaced. Do Not dis-assemble
a component if it is a part intended for replacement only.
14. When storing a pump or its components for any reason it is recommended they be stored in a clean area
and covered to protect from any dust, components that have been washed be coated which oil if they are made
of material that may rust.
MOTOR SERVICE & REPAIR