Pressure Test
- Note pressure reading with valve open and engine idling. Pressure should be 80-125 psi (6-9 kg/cm2
). If pressure is above 200 psi (14 kg/cm2
), check hoses for restrictions and poppet valve for proper assembly.
- Completely close and reopen gate valve 3 times. Record highest reading each time. DO NOT close valve longer than 5 seconds. Readings should be within specifications. On "G", "P" and "R" & "V" Series, see Fig 1
. On all other models, see PRESSURE TEST SPECIFICATIONS TABLE.
- If readings are within specifications and within 50 psi (4 kg/cm2
) of each other, pump is operating properly. On "G", "P" and "R" & "V" Series, see Fig 1
. On all other models, see PRESSURE TEST SPECIFICATIONS table.
- If readings are higher than specifications and not within 50 psi (4 kg/cm2
) of each other, flow control valve in pump is sticking. Remove and clean or replace flow control valve.
- If pressure is constant but more than 100 psi (7 kg/cm2
) below specifications, clean or replace flow control valve in pump. If readings are still low, replace pump.
- If pump is within specifications, open valve, and turn steering wheel from right to left stops. Record pressure. DO NOT hold wheel against either stop longer than 5 seconds.
- Pressure should be within specifications. On "G", "P" and "R" & "V" Series, see Fig 1
. On all other models, see PRESSURE TEST SPECIFICATIONS TABLE. If pressure is low, steering gear is leaking internally and must be repaired.
Courtesy of GENERAL MOTORS CORP. PRESSURE TEST SPECIFICATIONS
| Application |
Idle Pressure - psi (kg/cm2
) |
Relief Pressure - psi (kg/cm2
) |
| Astro & Safari |
80-125 (6-9) |
1250-1350 (87-95) |
| C15/25 & "K" Series |
80-125 (6-9) |
1200-1300 (84-91) |
| C35 |
80-125 (6-9) |
1350-1450 (95-102) |
| C35 (W/ Hydro-Boost) |
80-125 (6-9) |
1465-1515 (103-106) |
| "S" & "T" Series |
80-125 (6-9) |
1100-1200 (77-84) |
BELT TENSION (Tension in Lbs. Using Burroughs Tension Gauge)
| Application |
New Belt |
Used Belt |
| Serpentine Belt |
|
|
| "V" Belt |
146 |
67 |