Firemack

Albert,

Are you talking about the Pressure Volume transfer valve? Is the valve operator using engine vacuum? If so you also have a manual lever under the pump that operates the valve. Try to operate it manully. You should have a QL75 hale pump, I can check the diagram and let you know if there is any lubrication point for the valve.

Firemack

Albert,

New are not available, the easiest solution is to send them to Whitepost Restoration in Virginia, they do excellent work and rebuild the cylinders with brass sleeves and are then guranteed for as long as you own the truck for about the same cost as new. 2 day turnaround. They include all new hardware and rubber etc.

Firemack

Tom,

I have a Mack Distributor chart from the Mack Museum, it lists a 1112337 as Mack part number 423GB-3102, which I think is used on a Mack 707. I work on another 707 that has a different cap than the one you have but is part number 423-GB-3103.

Not sure if that helps, if you can find the mack number stamped in the side of the housing that could be useful. The serial number is usually a date code so your code of 3 B 20 would be 1953, Feb, 20 or could be 1943 Feb 20.

Firemack

Allison,

They did make a lot of the custom coupe cabs, with the rear panel integrated with the pump body. This was for several reasons, some customers wanted more storage in the cab, more seats, or another access to the cab. You should buy Harvey's Mack books on the B model and L Model fire trucks as he has many of the various configurations in the book as a record of the types of trucks that Mack custom built.

I can check with Harvey to see if still has any left, or check on Ebay.

Firemack.

Devious 10,

Here is a nice looking heavy duty Dayton wheel and hub. The lighter duty version used a hub cap, this one has a chromed plate that bolts onto the hub.

www.bigmacktrucks.com/uploads/1244346944/gallery_121_705_148074.jpg

Firemack

Alison,

First congratulations on taking best of show at the Harrisburg Muster, that is an honor and you should be proud of the work you did to return your truck to splendor that it had when new. I heard a lot of good comments, but was not able to attend myself. I hope to see your truck at another event.

I think you may have seen a B model coupe with a custom cab. These used the standard B or L model cab but had a custom roofline to meet the rear pump body. If you have any pictures that you can post I can confirm that with you.

There is a muster coming up at the Rose Tree Park in Media PA on August 2nd and would be great to see your truck there. All BMT members, old Macks and Firetrucks are welcome.

Great Job on your truck,

Firemack

Fireflem,

You can go either way, they make 12V positive to negative convertors, which were commonly used for radios for Mack firetrucks for years.

Firemack

Fireflem,

Best to start with the basics, do a compression test, find out if all cylinders have proper compression and are working correctly, then if OK, go through the ignition system (points, plugs,condensor cap and rotor)- if you want to go hi tech you can get electronic ignition for the truck and will then never need to adjust or change the points again. Mallory has a set for 12v Positive ground; then the last thing is to then the adjust the carb. Sounds more like an ignition problem if it will run but not accelerate smoothly. Also change the fuel filter(s) as that could be another source for poor performance.

Let us know how it works out.

Firemack

Gary,

The center shaft is about 5/8" in Diamater, the 1503 has a rubber center gasket so it slides down on the center shaft a little tighter than the original but fits nicely on the 1960 707 engine. I also use the same 1503 on the 1954 464 Mack engine. Make sure the mechanic knows that the filter doesn't just drop on the shaft,it does need to be pushed (lightly down) to get the rubber to slide over the center shaft.

The original Napa 1237 was .625" ID, 4.5" OD 8.25"H

The new Napa 1503 is .567" ID 4.092" OD 8.039" H

The difference is about 1/16" on the ID and the rubber gasket expands to allow the center shaft to slide on.

Firemack

Fire 413,

Thanks for posting these pictures, that is a great looking B model mack. From the body and air filter, it looks like a 63-66 B model, it has the full compartments on the rear body and what looks like a diesel air cleaner. Also very rare in the east is the Budd type wheels. Any ideas where that truck is today?

Firemack

I posted this in the other forum but figured i would add it here. Can anyone help.

My 1957 B model has a vacuum line and an atmospheric line running to the trailer. The trailer has a vacuum booster which operates the master cycliner. My vacuum booster has a bad diaphram and i am having one heck of a time finding another. Any ideas... also if i can not find a diaphram could i replace the booster with a newer version??? Please help

Allison

Allison,

There are several companies that rebuild hydrovacs, Whitepost in Virginia (540) 837-1140, is a very good rebuilder of brake parts , I have used them on several jobs and they provide excellent service. You can also check hemmings magazine, or call these guys http://vehiclesofvictory.com/buying-sellin...ction-to-parts/ they sell hydrovacs and may be able to give you the right contact to buy parts.

Firemack

Gary,

I called Shell and spoke to a Shell Rotella engineer and Shell recommends a straight weight oil as that was best for motors that were designed for the that type of oil. I just ordered Rotella SAE 40 from my Napa dealer. They don't stock straight SAE 40 anymore so you you need to order it, takes about 2 days. I order 6 gallons. The 707 takes about 18 quarts (4 1/2 gallons), but make sure to drain, refill and check the dipstick after the oil change to make sure you have the right amount in crankcase. I use the Napa 1503 to replace the Napa 1237, it is about 1/2" in OD smaller but does not effect the operation.

Firemack

Albert

Here is another quaility rebuilder. http://www.kanter.com///home.aspx I have used them for 2 fuel pumps. You send in your fuel pump, they rebuild it and ship it back for $88.

Good Luck,

Firemack

I judged a SPAAMFAA Muster today and had a great showing of 27 Mack Firetrucks, including a 1932 early B Mack

I was able to line up most of the B and L Models and have included all of the trucks in my Gallery under 2009 Events

BigMackTrucks.com > Gallery > User Information > 2009 Event Pictures

Firemack

Paulbrook,

That Old Bulldog is coming along nicely, I always say try to get one more item done everyday, espacially when everything is all apart and it seems like you are never going to get the project back together- just keep up the steady progress!

Firemack

Greg,

The grill shells are identical on the B75F,B85F, and B95F so the only way for Gary to confirm is using the frame rail and see what the truck was from the factory.

Firemack

Gary

The B75 had a 464 or 510 engine and 750GPM pump, (and there were only 54 built). The B85 had the 707 engine and 750GPM pump. so to confirm you should check the right frame rail above the front axle to see the serial number which is stamped in the frame and should be able to confirm if the serial number starts with B75 or B85. If it was a B75 someone swapped the engine or a B85 and someone swapped the emblems.

Firemack

Matthew,

If you check out the SPAAMFAA.org website they have a classified ad section and you could list it there as there may be someone that really wants to put that radio in another antique truck, even though you most likely won't be able to transmit to anyone- it still looks like the radio that came in the older antiquess.

Firemack

RW613,

I just answered this on another post, the best oil for older gas engines is Shell Rotella T SAE 40W, it is a high quaility oil and provides excellent protection for the older gas engine combustion compounds etc. .

Firemack

Gary,

Shell Rotella T SAE 40w would be a good choice for the 707 gas engine. You need to post pictures for the other parts you need so we can see what you have, most of the trucks have different types of air cleaners etc. based on the options.

Firemack

Gary,

There are still rebuild kits available (I got mine from Barry at Watts mack) (you need to provide the carb model number) and also speciality carburator shops- I needed some extra work on my carb and sent it to Classic Carb in Phoeniz AZ.

For contact info see the old parts list http://www.bigmacktrucks.com/MusicVid/part...ierslisting.pdf

They rebuilt and bench tested the carb and it runs better now than when it was new.

Firemack

Baderjune

You can have the waterpump rebuilt. There are several waterpump rebuilders. I used arthur gould in new york to rebuild our water pump on our B75, the cost was about $105 and took about 1 week. You can find arthurs contact info if you searrch this site or google

That is a nice looking B95!!

Firemack

FRD1419

Try contacting Cal Little, he restores antique Mack Fire trucks and has lots of old Mack Parts. 717- 566-8973. Best time to call is around lunch or 5pm.

Firemack

Bumblebee

That looks good , like a B75 with the aluminum polished up, what color will the grill guard be?

Firemack

Try Paul Romano, He has lots of CF parts.

He can be contacted at paulromano@pipeline.com

Firemack