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Section 7
7.3 HYDRAULIC SYSTEM
A. CHECKING HYDRAULIC OIL LEVEL
The hydraulic oil level should be checked after the first 8
hours of operation. Thereafter, check the oil after every
200 hours of machine operation or monthly, whichever
occurs first.
- IMPORTANT -
If the oil level is consistently low, check for leaks
and correct immediately.
1. Wipe dirt and contaminants from around the
reservoir cap. Remove the cap from the hydraulic oil
reservoir.
2. Visually check the level of hydraulic oil. Hydraulic
oil must be at least 2" inches from top of the filler
neck. If the level cannot be determined visually,
use a clean tape measure to check the level. If the
fluid is low, add 20W50 motor oil. DO NOT overfill;
(overfilling the oil reservoir may cause oil seepage
around the cap area).
3. Clean the fill cap and install it onto the reservoir.
B. CHANGING HYDRAULIC OIL
The hydraulic oil should be changed after every 500 hours
or annually, whichever occurs first. The oil should also be
changed if the color of the fluid has become black or milky.
A black color and/or a rancid odor usually indicates possible
overheating of the oil, and a milky color usually indicates
water in the hydraulic oil.
- IMPORTANT -
The hydraulic oil should be changed if you notice
the presence of water or a rancid odor to the
hydraulic oil.
1. Park the mower on a level surface and stop the
engine.
2. Place a suitable container under the hydraulic oil
drain. Remove the fill cap from the reservoir. Remove
the drain cap from the tee fitting located on the
hydraulic system filter head. See Figure 7-2. Allow
the fluid to drain into the container and properly
discard it.
Hydraulic Oil
Drain Cap
Figure 7-2. Hydraulic Oil Filter and Drain Plug
3. Re-install the drain plug into the tee fitting and be
sure it is tight.
Before refilling the hydraulic oil reservoir the
hydraulic oil filter should be changed as outlined
in Procedure C "Changing Hydraulic Oil Filter
Element".
4. Fill the reservoir to 2" inches from the top of the filler
neck with 20W50 motor oil.
5. Replace the reservoir fill cap. Start the engine and
drive forward and backward for two minutes. Check
the oil level in the reservoir. If necessary, add oil to
the reservoir.
C. CHANGING HYDRAULIC OIL FILTER
ELEMENT
The hydraulic oil filter should be changed after every 500
hours of operation or annually, whichever occurs first.
1. Remove the oil filter element and properly discard it.
See Figure 7-2. Fill the new filter with clean oil and
install the filter. Hand tighten only.
2. Run the engine at idle speed with the speed control
lever in neutral for five minutes.
3. Check the oil level in the hydraulic tank. It must be
2" inches from the top of the filler neck. If necessary,
add SAE 20W50 motor oil.
29
Filter Head
Hydraulic Oil
Filter
2003SWZ-Oil Drain
- NOTE -
R
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