Restrictor Orifice Fitting - American — a direct-fit replacement hydraulic fitting. Ordering the hydraulic fitting from us gets you the OEM piece that matches the lift, not an aftermarket knock-off that is close but not the same. Specifications Part number: ALS-7170-04 Type: Genuine OEM hydraulic fitting Seals and hoses age on two clocks at once: cycles and years. A cylinder seal wears from the miles the rod travels; a hose gets brittle just sitting in shop heat and cold. Run dirty fluid and you speed both up, because grit scores the barrel and the rod and shreds seals from the inside. Most lifts that pump every day start weeping a seal somewhere in the eight-to-fifteen year range. The hydraulic side of a lift is a closed loop: the power unit's motor drives a pump that pushes fluid from the reservoir, through a hose and fittings, into a cylinder that does the lifting, while a lowering valve meters it back to tank on the way down. Every part in that loop either moves fluid, holds pressure, or seals it in. When one link weeps or won't hold, the whole lift feels it. Replacing your hydraulic fitting Most hydraulic repairs share the same discipline: relieve pressure, keep the system clean, replace the part, then bleed the air and verify the lift holds under load. Contaminated fluid or trapped air will undo an otherwise good job. Because these parts keep a vehicle safely in the air, the full procedure is worth following start to finish. Full step-by-step: how to replace a car lift hydraulic hose. Find the right part for your lift Want to be sure before you buy? Pull the model and serial off your lift's plate and open our parts lookup to open the exploded parts breakdown for your model — find your part on the drawing and you know it fits. New to finding your model number? our guide to finding your model number covers it, or send a photo of the plate and we will read it for you. Signs of a hydraulic problem Check for drift-down as the clearest internal-leak test: raise the lift, shut it off, and time how long it holds. A properly sealed system holds height for days. Noticeable sag in a few hours points to the lowering valve not seating, a failed check valve, or a piston seal passing fluid — cracking the cylinder and watching whether it sags with the valve closed isolates which. Parts commonly replaced at the same time A hydraulic repair is the right moment to handle the parts that fail alongside this one — seals, o-rings, the hose that feeds it, and fresh oil for the refill. Opening the system twice for parts you could have done together is wasted labor. We will build the seal-and-hose kit for your lift so the repair is complete in one go. Hydraulic fluid When you refill, use the right oil: ISO-32 hydraulic fluid on most lifts, or Dexron ATF on some older designs — never a blend of the two. Your installation manual lists the correct capacity for your specific lift, so fill to that spec and re-check the level after you have cycled and bled the system. Safety notes Hydraulic parts hold a vehicle in the air on pressure and a column of oil — respect both. Relieve system pressure before you crack any fitting, cap every open port so grit stays out, and bleed the system fully before the lift carries a load. Air in the lines is what causes a lift to drift or drop unexpectedly. Before you order Have the data plate in front of you when you order — model, serial, and voltage if it is a power unit. Match hose length and fitting type against the old part, and remember the job includes fresh oil and a full bleed. Not sure whether you need the part or just seals? Call and we will sort it. Not sure this fits? Here's how to check Pull the number off your lift's model plate first — model and serial both. Manufacturers run mid-cycle revisions that keep the model name but change hardware, so two lifts with the same name on the column can take different parts. The serial is what removes the guesswork. Second check: compare the old part against this listing before you order. Length, mounting pattern, and thread sizes tell most of the story. If anything doesn't line up, or if the old part is too worn or broken to measure, call us with photos — we work on these lifts every week and can usually confirm fit from a picture and the lift's serial faster than you can dig through a parts diagram. Why buy your hydraulic fitting from Auto Lift Services We install, inspect, and repair automotive lifts every week — the ALS-7170-04 is a part we handle in the shop, not a random SKU we drop-ship. The phone answers if you have a question mid-install — call 800-674-9302 — and every part ships genuine, no aftermarket substitution unless you ask for it.
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