Michael Mayben
IHPA Tech Moderator - Retired & No Longer Online
Yep, here we go again, one more brake bleeder that eliminates a pedal-pumper.
This unit is street priced at harbor freight for $29.95 usually, this time it was on sale for $19.95 so I snaked one to see how it worked.
Works off the principle of pulling a partial vacuum on each wheel cylinder/caliper in turn, same as using the mityvac hand vacuum pump. Only the vacuum pump in this unit is pneumatically operated from a compressed air source.
Above average quality of the plastic stuff for typical hf, even the bleeder hose is a silicone material which should be unaffected over the long term by any hydraulic fluids.
The filler bottle adapters are sized for the typical euro-asian master cylinder reservoir necks, three adapters come with the unit. One of the adapters will work on the girling-pattern master cylinder used on the Scout 80. But none of those adapters will work on any other IH-app master. So using the source fluid bottle in an "automatic" form is out of the question unless it's adapted.
Both plastic containers are reasonable thickness, the screw on tops are nicely made and seal/hold vacuum just fine.
This unit works by connecting the gun to a compressed air source of 90>120psi. A quick-connect fitting on the bleeder hose is snapped onto the nipple of the bleeder screw (once it's broken loose) and fits very well on all sizes of bleeder screws I have on hand here in the shop.
Once the bleeder screw is cracked, then the trigger on the gun is actuated and instantly a vacuum is pulled on the waste fluid jug, visible flow of fluid and air bubbles is easily monitored, when the stream becomes solid, the air is pulled from the previously-opened hydraulic plumbing. Same principle as using the mityvac except the vacuum is created through the gun/pump system instead of by constantly squeezing/releasing the mityvac trigger to pull a partial vacuum.
This unit is street priced at harbor freight for $29.95 usually, this time it was on sale for $19.95 so I snaked one to see how it worked.
Works off the principle of pulling a partial vacuum on each wheel cylinder/caliper in turn, same as using the mityvac hand vacuum pump. Only the vacuum pump in this unit is pneumatically operated from a compressed air source.
Above average quality of the plastic stuff for typical hf, even the bleeder hose is a silicone material which should be unaffected over the long term by any hydraulic fluids.
The filler bottle adapters are sized for the typical euro-asian master cylinder reservoir necks, three adapters come with the unit. One of the adapters will work on the girling-pattern master cylinder used on the Scout 80. But none of those adapters will work on any other IH-app master. So using the source fluid bottle in an "automatic" form is out of the question unless it's adapted.
Both plastic containers are reasonable thickness, the screw on tops are nicely made and seal/hold vacuum just fine.
This unit works by connecting the gun to a compressed air source of 90>120psi. A quick-connect fitting on the bleeder hose is snapped onto the nipple of the bleeder screw (once it's broken loose) and fits very well on all sizes of bleeder screws I have on hand here in the shop.
Once the bleeder screw is cracked, then the trigger on the gun is actuated and instantly a vacuum is pulled on the waste fluid jug, visible flow of fluid and air bubbles is easily monitored, when the stream becomes solid, the air is pulled from the previously-opened hydraulic plumbing. Same principle as using the mityvac except the vacuum is created through the gun/pump system instead of by constantly squeezing/releasing the mityvac trigger to pull a partial vacuum.
