System Pressure Test - Dometic HC4645H Troubleshooting Manual

Hydraulic steering systems
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Front Mount, Outboard Pivot cylinders
Single
Dual
**
Triple
**
Quad
**
Table 6-2.
Front Mount, Outboard Pivot cylinders
BA125-7
BA135-7
BA150-7
BA175-7
BA150-9
BA175-9
BA200-7
BA200-9
BA200-11
Table 6-3.
18
Disp. (in
***
8.3
16.6
24.9
33.3
Disp. (in
***
7.2
8.2
10.2
13.7
13.1
17.7
18.9
12.25
29.7
* Any system using a helm greater than 2.4 in3/rev & power assist, requires dual
SPA's in parallel.
** Displacement is total effective cylinder volume (assumes cylinders are plumbed
in parallel not series).
*** Includes Tournament Series and -3 outboard cylinders.

6.2 System pressure test

The test noted below is to assist with locating a leak within the steering
system, any leak that is found within the steering system MUST be corrected
prior to use. Even the smallest leak may lead to loss of steering control.
• Clean and wipe dry ALL connections. Ensure helm is filled with
steering fluid.
• Turn steering hard-over to the port side.
• After the wheel stops, force it 1 turn past the stop point. Leave wheel in
this position for at least 5 minutes. Inspect ALL areas for signs of a leak.
If leak is not visible feel for a leak. Any oily feel is a leak.
• Repeat turning hard-over in the starboard direction.
Good
SeaStar Helm Disp. (In
)
1.4
1.7
3
5.9
4.9
11.9
9.8
17.8
14.6
23.7
19.5
Good
SeaStar Helm Disp. (In
)
1.4
1.7
3
5.1
4.2
5.9
4.8
7.3
6.0
9.8
8.1
9.4
7.7
12.6
10.4
13.5
11.1
15.2
12.5
21.2
17.5
Optimal
/Rev)
3
2.0
2.4
3.0
4.2
3.5
2.8
8.3
6.9
5.5
12.5
10.4
8.3
16.6
13.8
11.1
Optimal
/Rev)
3
2.0
2.4
3.0
3.6
3.0
2.4
4.1
3.4
2.7
5.1
4.3
3.4
6.9
5.7
4.6
6.6
5.5
4.4
8.9
7.4
5.9
9.5
7.9
6.3
10.6
8.9
7.1
*
14.9
12.4
9.9
*
*
*
*
*
*
*
*
*
*
EN

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