Before fitting a replacement hydraulic steering rack, check the rest of the circuit. Old fluid and debris can remain in the lines, pump and reservoir, ready to circulate through the replacement. CARDONE's flushing bulletin identifies that contamination as a cause of accelerated wear and poor operation. [1]
For a parts buyer, this matters when discussing a repair or a return with the workshop. A correct OE match answers the fitment question; it does not establish that the hydraulic system is ready for the new rack. Keep those two checks on the job record.
Keep a record of what came out
Before the old fluid is discarded, ask the technician to record its condition. A photograph of a sample in a clean container, visible debris and any burnt smell gives the next person something more useful than “the oil was bad.” Note previous top-ups too, especially when the fluid used is unknown.
There are several places for contamination to start. CARDONE describes metal particles from worn components and fragments released as hoses deteriorate internally. Those particles can obstruct small passages or interfere with valve operation. Its hose bulletin also identifies reservoirs with internal filters and steering coolers as possible restrictions where fitted. [2]
Record what is visible without turning the photograph into a diagnosis. Dark fluid alone is not enough evidence for a buyer to decide which component failed or who is responsible. The workshop still needs to establish the cause.
The bottle needs to match the specification
Write down the fluid specification required for the vehicle, then check the product selected against it. A colour description or a bottle labelled “power steering fluid” is not a substitute for that check. Some applications require another specified fluid type. CARDONE also warns that ordinary workshop cleaning chemicals can damage steering seals. [3]
When a workshop asks a supplier which oil to use, include the vehicle details and the requirement from the service information. If the identity of the existing fluid is uncertain, say so.
Look beyond the rack while the lines are accessible
A hose can be deteriorating inside even when an external leak is not obvious. Check its condition, connections and routing. Cracks, abnormal softness or hardening deserve attention; they should not disappear from the repair discussion just because a new rack has arrived. [2]
CARDONE's rack replacement notes call for checks of collapsed hoses, a blocked remote reservoir and pump pressure. On belt-driven systems, the drive belt also needs inspection. These checks help the technician assess the circuit instead of assuming that every loss of assistance starts inside the rack. A pump replacement should follow the findings, not be added automatically. [4]
Flushing and bleeding do different jobs
Flushing removes old fluid and contamination. Bleeding deals with air in the system. Treating a reservoir top-up as a complete flush, or using a completed bleed as proof of cleanliness, leaves an important question unanswered. CARDONE lists flushing, bleeding and final operating checks separately. [1]
The actual procedure depends on the application. Use the specified method for disconnecting lines, circulating fluid and removing air; keep the pump from running dry. Do not copy a turning count, fluid quantity or engine-running instruction from an unrelated vehicle. Check any filter requirement against the applicable installation instructions as well. [1] [4]
What to put on the handover sheet
A distributor does not need to turn an invoice into a workshop manual. A few specific records make follow-up questions much easier to answer. The table below is a suggested job record, not a warranty condition.
| Record | Useful detail |
|---|---|
| Vehicle and part | Vehicle identifier, original OE label, replacement reference and LHD/RHD configuration. |
| Original complaint | Leak location, noise or assistance problem, plus the technician's findings. |
| Fluid | Required specification, product used, and observations of the removed fluid. |
| Circuit condition | Hoses, reservoir and pump checked; defects found and parts replaced. |
| Completed work | Applicable flushing and bleeding procedure followed, then operating and alignment checks recorded. |
After installation, the workshop should check fluid level, leaks, noise and assistance, and complete the required wheel alignment. An unresolved problem needs diagnosis before the vehicle is handed back. [1] [4]
Still identifying the replacement? Use our OE number guide and LHD/RHD checks. For a KITLAMT enquiry, send the original label and clear connection photos with the vehicle details through our contact page.