Hydraulic System - Scag Power Equipment STT61V-25KBD-SS Operator's Manual

Section 7

7.3 HYDRAULIC SYSTEM

A. Checking Hydraulic Oil Level
The hydraulic oil level should be checked after the first
10 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 3" 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.
Figure 7-2 Hydraulic Oil 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.
1. Park the mower on a level surface and stop the
2. Place a suitable container under the hydraulic oil
3. Re-install the drain plug into the reservoir and be
Hydraulic Oil
Reservoir
4. Fill the reservoir to 3" inches from the top of the filler
5. Replace the reservoir fill cap. Start the engine and
2007 STT HOR
33
-NOTE-
The hydraulic oil should be changed if you
notice the presence of water or a rancid odor
to the hydraulic oil.
engine.
reservoir. Remove the fill cap from the reservoir.
Remove the drain plug from the bottom of the
reservoir. (See Figure 7-2). Allow the fluid to drain
into the container and properly discard it.
sure it is tight.
-NOTE-
Before refilling the hydraulic oil reservoir the
hydraulic oil filter should be changed as
outlined in Section C on the next page.
neck with 20W50 motor oil.
drive forward and backward for two minutes. Check
the oil level in the reservoir. If necessary, add oil to
the reservoir.