47210-N3001 47210-N4300 VACUUM BRAKE BOOSTER FOR NISSAN 240Z 280Z

Description

Product Details
Product Name: Vacuum brake booster
Part  No.: NI321
OEM No:
47210-N3001  47210-N4300
Car Brand: FOR NISSAN
Model: FOR  NISSAN 240Z 1973
FOR  NISSAN 280Z 1975-1978
Size: 7''
Booster Feature
1.100% quality diaphragms, plastic hub and check valves are installed on every unit for perfect performance
and
reliability
2.All vacuum power brake booster units are 100% vacuum tested to ensure reliable.
3.Exclusive rust-against finishing process extend unit life.
4.Master cylinder output rods are pre-adjusted for easier and faster installation
5.New mounting nuts and washers ensure proper, hassle-free installatio
About Us
We are professional vacuum brake booster, clutch booster, racing connecting rods, crankshaft, cylinder head, maker, we
are engaged
in this fields more than 15 years, our products are sold all over the worlds, gained good reputation. We are
always insist
principle of
quality is life of company, customer is our god, and sincerely welcome customer to cooperated
with us and
win together.
Due to we
have hundreds of products, we can not list all products on Wish, if you don?t find the
products you wanted,
please feel
free contact us.
About Import Dudy and Tax
Import duties, taxes are not included in the item price or shipping cost, buyer is responsible for
paying
any import duty and tax, for details, please check with your custom to find what additional
charge will pay before you place the order.
About Shipping
1.We will use DHL, FEDEX,UPS and EMS for international shipments, if you have a special requests in
shipping, please make a note when you pay, we will try to meet your requests according to actual
situations.
2.If your address is remote area, buyer will pay extra remote charge.
About Comments
1.Thanks for respected customer to use our products, we sincerely hope it will bring you happiness
experience. If you are satisfied with our quality and service, please kindly give us five star comments.
2.When you receive the products, if there is any problem, please contact us at the first time, we will try
to help you until the problem is solved.
About  Warranty
1.We do offer you 1 year quality warranty, professional installation is strongly suggested, any damage
for  engine or machine caused by non-professional installation is not included in the scope of  warranty
About Return Policy
We always pay more attention to satisfy our customers request in quality, but return are accepted within
10 working days
of receiving the products, we hopefully we can receive a return item with good
condition and packing,
b
efore your return, please contact us first, we will try to give you a good solution.
FAQ of Brake booster
1. What does a booster do?
A power booster helps assist pushing the master cylinder piston when you apply the brakes.
2. What are the performance of a problem brake booster?
A bad power booster will give a very hard pedal, it will feel like you need two feet to stop the car.
3. What size booster should I use?
For lighter weight vehicles like street rods a 7" booster will work fine for disc/drum set ups. For a 4 wheel disc system a
7"
booster will not give enough assist. An 8" dual diaphragm booster is the ticket for 4 wheel disc.
4. The brake pedal is low and soft. I think I need to replace the booster, right?
No. The booster will never cause a low or soft pedal, check for air or other hydraulic problems. A failed booster will
only
cause the pedal to become hard or not return.
5. After some time of brake applications, the pedal starts to get hard. How do I fix this?
Check the vacuum source to the booster. Not only does the booster need at least 15 in. Hg, it also needs vacuum
volume. The fitting normally on the intake manifold or carburetor will get clogged with carbon build up and restrict the
vacuum volume.
6. I replaced the booster and now the brakes are locked up and won't release. What should I do?
Replace all brake fluid. Brake fluid is hygroscopic which means it absorbs moisture. Too much water in brake fluid will
cause vapor lock and apply pressure to the wheels. Also, carefully check for proper push rod adjustments and stop
light/cruise control switch adjustments.
7. The original problem was a hard brake pedal. I replaced the booster and I still have the same thing. What can I do
now?
Check for a seized caliper/wheel cylinder, pinched or restricted brake line. Next check vacuum source. Check for at least
15 in Hg. Next check vacuum volume. TIP: An easy test is to park a vehicle with a good brake pedal next to your car and
run the vacuum to booster in question. If pedal is OK now, vacuum source is insufficient.
8. I installed a new booster. Why am I hearing an air noise under the dash?
This is usually a normal noise made during brake application due to atmospheric air entering the booster filter located
around the push rod. Tip: Moving the silencer (foam seal) may reduce noise level.
9. I replaced 2 boosters in during one year. What may cause the situation?
Check for gas vapors in the booster. If the vehicle's PCV is clogged, gas vapors will enter the booster and dry up the
diaphragm. Repairing PCV system and installing a charcoal vacuum filter will eliminate problem.
10. I took off my old booster and there was brake fluid between the master cylinder and booster. Which one do I replace?
Replace both master cylinder and brake booster.
11. How much pressure should I be getting to the wheels with a power booster?
Typically you should expect about 1.0MPA. to the wheels for a disc brake system. A disc brake system requires this
amount of pressure so be careful when using a smaller 7" booster that puts out only 0.9MPA pressure.
12. How much vacuum is needed to operate a booster properly?
For a brake booster to function properly you will need at least 16" of vacuum. Anything lower will give you a hard pedal.
13. I have drum brakes, can I use the same booster if I change to disc brakes?
Sure. Just be sure to they have same brake master cylinder.
How to Replace a Brake Booster
A brake booster is a critical component of many braking systems. It magnifies the slowing or stopping force of the
existing
brake system,
making it more powerful and more effective. To have a brake booster go out basically equates to
having the entire brake
system go out; as the
remainder of the brake system is designed to have the booster in place.
Replacing the booster isn't a difficult matter; if
you can change your
brake pads and bleed your brakes, you can change
the booster. The brake booster isn't usually an expensive part either,
typically around one
hundred dollars. Here you will
find the information needed on how to chance a brake booster.
Step 1 - Locate the Brake Booster
The brake booster is located adjacent to the master cylinder. There will be 4 mounting screws protruding through the
booster. The booster is
also attached to the brake pedal in the interior of the car. This is where you will start work in
replacing the brake booster.
Step 2 - Remove the Brake Booster
Start by locating the booster rod that goes through the firewall and is attached to the brake pedal on the interior of the
car.
Typically, there is a
cotter pin that secures the rod to the pedal, but there may also be nuts. When removing any
fasteners in the course of this job, make sure to
retain the nuts, cotter pins, and various other fasteners as the new brake
booster will not come with replacement
fasteners.
Remove the fasteners, whether it is a cotter pin or nuts. Slide the rod
off
the brake pedal. Disconnect the vacuum brake
line that connects to the
booster. In the engine compartment, there are
four bolts securing the booster to the master cylinder and firewall. Loosen
and remove these
nuts. Remove the nuts
there are usually 2 in addition to the 4 that have already been removed) that secure the brake
booster to the
master
cylinder. Wiggle the brake booster away from the master cylinder. There is a seal between the two. You will need
to keep
this as the new part
does not generally come with another one. Remove the brake booster.
Step 3 - Install the New Brake Booster
Set the new brake booster on the four mounting screws. Tighten the nuts on the bolts to the master cylinder. Insert the
push rod through the
firewall. Start these by hand so that the threads are not ruined. Reattach the vacuum hose, then
the
nuts to the 4
mounting screws. Reattach the
push rod to the brake pedal by whatever means it was originally
secured
with, whether by cotter pin or by bolts.
Step 4 - Bleed the Brakes
You will need to bleed the brakes after replacing the brake booster.