rQuestionEngineering
Mechanical
Daihatsu master brake pump.
Why is there a slot on this surface ?
Any function ?
Why is there a slot on this surface ?
Any function ?
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Daihatsu master brake pump design. 1
- Thread starter rQuestionEngineering
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LittleInch
Petroleum
A locating lug?
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
I was also thinking weep hole.
Except it would prevent leaking fluid from entering the vacuum booster, and eventually the engine.
But, it doesn't seem to be a very common feature on master cylinders. Maybe a manufacturing locations feature.
Except it would prevent leaking fluid from entering the vacuum booster, and eventually the engine.
But, it doesn't seem to be a very common feature on master cylinders. Maybe a manufacturing locations feature.
Compositepro
Chemical
I've seen that feature a number of times, and there is a gasket with no matching key. that is a drainage groove.
Appears to be a blind groove, probably a casting feature for alignment during machining or a mating feature on the firewall.
edit: draining what and from where?
The part in the picture:
TRW BRAKE MASTER PUMP PERODUA MYVI OLD 1.3 [NO ABS/3PIPE] (PMD907)
Better image:
Car this is from:
Installation/Removal Looks like OEM doesn't have the groove.
A list of similar questions:
edit: draining what and from where?
The part in the picture:
TRW BRAKE MASTER PUMP PERODUA MYVI OLD 1.3 [NO ABS/3PIPE] (PMD907)
Better image:
Car this is from:
Installation/Removal Looks like OEM doesn't have the groove.
A list of similar questions:
Compositepro
Chemical
Drainage of oil leakage, rain water, condensation.
btrueblood
Mechanical
Dave, the replacement part in that video doesn't have the groove either, probably an OEM replacement vs. TRW aftermarket part?
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1
- #11
older BMW -
Some alfa
brake fluid in the booster of some triumph TR
"There is a small indent in the booster body where the MC bolts up to allow any fluid to drain, but clearly it isn't big enough so I've cut another groove into the MC mounting face so I'll see any leakage early on hopefully."
C3 (shark) corvette master cylinder
Some car and Motorcycle master cylinder ( hydr clutch and brake ) have weep holes.
Some power brake boosters have a bleed groove out the MV mounting face.
IF a leak develops where the push rod enters, AND there is no feature to direct it safely ( ≈ fail safe) , the errant fluid WILL go into the interior of the car or the brake booster.
The rubber in brake boosters does NOT like brake fluid, and vice versa.
A manufacturer who omits a weep hole in any component that attempts to seal liquid inside is either a crook or dope in my opinion.
“It depends on what the meaning of the word ‘is’ is.”
Some alfa
brake fluid in the booster of some triumph TR
"There is a small indent in the booster body where the MC bolts up to allow any fluid to drain, but clearly it isn't big enough so I've cut another groove into the MC mounting face so I'll see any leakage early on hopefully."
C3 (shark) corvette master cylinder
Some car and Motorcycle master cylinder ( hydr clutch and brake ) have weep holes.
Some power brake boosters have a bleed groove out the MV mounting face.
IF a leak develops where the push rod enters, AND there is no feature to direct it safely ( ≈ fail safe) , the errant fluid WILL go into the interior of the car or the brake booster.
The rubber in brake boosters does NOT like brake fluid, and vice versa.
A manufacturer who omits a weep hole in any component that attempts to seal liquid inside is either a crook or dope in my opinion.
“It depends on what the meaning of the word ‘is’ is.”
- Thread starter
- #12
rQuestionEngineering
Mechanical
Great post! Tmoose
IF a leak develops where the push rod enters, AND there is no feature to direct it safely ( ≈ fail safe) , the errant fluid WILL go into the interior of the car or the brake booster.
IF a leak develops where the push rod enters, AND there is no feature to direct it safely ( ≈ fail safe) , the errant fluid WILL go into the interior of the car or the brake booster.
Since you have the part, look for the weep hole. The photo did not have one and the OEM master cylinder does not have the groove.
Some other units for cars do.
You will know there is a leak because you will run out of brake fluid and should get a low fluid warning.
Channeling it is the worst option for safety. You won't easily notice the leak as you would a carpet stain. You would run out of fluid before the booster failed.
Some other units for cars do.
You will know there is a leak because you will run out of brake fluid and should get a low fluid warning.
Channeling it is the worst option for safety. You won't easily notice the leak as you would a carpet stain. You would run out of fluid before the booster failed.
Produa VIVa master pump - note groove at bottom, but no weep hole in the bore:
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