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LANE Boys RC's Tamiya M1025 Hummer restoration

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LANE Boys RC's Tamiya M1025 Hummer restoration Empty LANE Boys RC's Tamiya M1025 Hummer restoration

Post by laneboysrc Tue 26 Mar 2013 - 22:10

Having finished our XR311, it is now time to get its brother, the Tamiya M1025 Hummer, back on the trail.

LANE Boys RC's Tamiya M1025 Hummer restoration 8241360262_9c77a2d66b

While the original paint job was very nicely done, LANE Boys Snr. is not a fan of camouflage and so the boys decided that this Hummer is going to be a white UN peace mission vehicle.

All the accessory parts like windows, roof hatch, light and air intake are screwed to the body, hence easy to remove.

The plastic parts were stripped with ordinary paint thinner, which worked surprisingly well. It was literally a matter of brushing the paint off. One can still see the decals that were applied to the car a long time ago.

LANE Boys RC's Tamiya M1025 Hummer restoration 8588486963_540cce9290

The gears are still in very good condition. The ball differential is also working perfectly. Everything has been cleaned and is ready for re-installation.

The motor is an original "Johnson" motor. We will replace it with a new Mabuchi RS540SH that we have from another Tamiya kit.

LANE Boys RC's Tamiya M1025 Hummer restoration 8589587658_80e78720de

All metal hardware has been cleaned and sorted. We were able to polish rust away nicely.

There are only a small number of different hardware components: most chassis screws are 3 x 10 mm self tappers, all body screws 2.6 x 10 mm. That's basically it.

LANE Boys RC's Tamiya M1025 Hummer restoration 8589587110_c423e36788

The plastic parts are in a very mixed condition.

LANE Boys RC's Tamiya M1025 Hummer restoration 8588486739_5c61623309

The parts on the left, which are the chassis, gear box housing, motor mount and shock towers (parts tree A and B) are in a sorry state. The plastic has hardened over the years in is extremely brittle. The parts literally break in your hands!

The hubs and carriers on the right (parts tree C) are also made from a hard plastic, but they are still strong and don't need replacement.

The parts in the middle are a soft and flexible plastic (parts tree D and E). They have survived well and will go back into the restored car.

We ordered a full set of sprues for the car anyway -- just in case.

LANE Boys RC's Tamiya M1025 Hummer restoration 8588486623_c7298cc8cd

More goodies: two pairs of shocks, new rims, a metal motor mount, and ball bearings (replacing plastic bushings).

LANE Boys RC's Tamiya M1025 Hummer restoration 8589587238_26776a38ed

We also ordered a gear set as we will use a gear differential both in front and the rear and keep the fragile ball diff off the trails.

Stay tuned for further progress updates!
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LANE Boys RC's Tamiya M1025 Hummer restoration Empty Re: LANE Boys RC's Tamiya M1025 Hummer restoration

Post by boolean21 Tue 26 Mar 2013 - 22:45

neat and tidy work..
looking forward to updates!

subscribed! Smile
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LANE Boys RC's Tamiya M1025 Hummer restoration Empty Re: LANE Boys RC's Tamiya M1025 Hummer restoration

Post by Zax13 Wed 27 Mar 2013 - 6:35

Looking forward to your marvelous work... cheers
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LANE Boys RC's Tamiya M1025 Hummer restoration Empty Re: LANE Boys RC's Tamiya M1025 Hummer restoration

Post by Marpek Thu 28 Mar 2013 - 7:55

With tamiya's super detailed humvee, plus your super detailed handy work... we cant wait to see it roll! cheers
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LANE Boys RC's Tamiya M1025 Hummer restoration Empty Re: LANE Boys RC's Tamiya M1025 Hummer restoration

Post by laneboysrc Thu 28 Mar 2013 - 8:34

Thanks guys flower

This will be a quick job though, I will not do any modifications.
The body shell needs a few holes closed that have grown over the years Laughing And it is missing the front tow plate with the D-shackles; I'll have to re-create it as good as I can in styrene.
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LANE Boys RC's Tamiya M1025 Hummer restoration Empty Part 2 - Body work

Post by laneboysrc Sat 13 Apr 2013 - 9:42

With all parts stripped and cleaned, it is now time to build the vehicle up again. First we were dealing with the body.

LANE Boys RC's Tamiya M1025 Hummer restoration 8588486963_540cce9290

Our Hummer body was in a good condition given its use and age, but on the front there was the tow plate missing.

To create a replacement we extracted the front view of the vehicle from the user manual and scaled it to exact size of the body on the computer before printing. I then cut it out from paper and glued it on a piece of styrene as cutting reference.

LANE Boys RC's Tamiya M1025 Hummer restoration 8644520552_3c3063ae2b

A support plate was cut from 1mm styrene that holds the tow plate to the body. Since this piece will not be seen it was cut rather quick and dirty.

The shackle mounts are from a scrap piece of plastic that had holes already drilled into it. The shackles are 3 mm D-shackles from a local hardware store.
(thanks Babyboy for the source flower).

LANE Boys RC's Tamiya M1025 Hummer restoration 8644520480_ea4d402de2

The finished tow plate mounted onto the body. Looks close to original.

LANE Boys RC's Tamiya M1025 Hummer restoration 8644520382_7d216a0e9e

The back of the car had three holes that needed filling. It was quite tricky to do to get a decent finish.

LANE Boys RC's Tamiya M1025 Hummer restoration 8644520316_65950c1e76

We managed to obtain a new sprue of body parts on eBay which included all front lights, the top hatch as well as the air intake. We only used the front lights which were quite damaged on our body.

LANE Boys RC's Tamiya M1025 Hummer restoration 8644520232_a36506ddcb

Ready to paint. With all accessories in place the first job was to spray the inside with flat black.

LANE Boys RC's Tamiya M1025 Hummer restoration 8644520136_f890ebd5ee

The body has been primed and painted with Tamiya Matt White TS-27.

LANE Boys RC's Tamiya M1025 Hummer restoration 8643423415_c15cb47eca

The paint turned out ok but far from perfect as I rushed too much. Now it is a matter of highlighting all those awesome body details.

LANE Boys RC's Tamiya M1025 Hummer restoration 8643423313_9638397032

Despite spending a large amount of time to close three holes on the back of the body, they are still visible.
I think that the Tamiya Basic Putty that I used is just not the right thing for the job as it affects the styrene. Or more likely: I am just doing it wrong.

LANE Boys RC's Tamiya M1025 Hummer restoration 8643423235_ba98836615

The rims were brand new and turned out flawlessly.

LANE Boys RC's Tamiya M1025 Hummer restoration 8644518830_ca5a28a191

Up next: rebuilding the chassis!
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LANE Boys RC's Tamiya M1025 Hummer restoration Empty Re: LANE Boys RC's Tamiya M1025 Hummer restoration

Post by Marpek Sat 13 Apr 2013 - 10:47

Im drooling..... Razz
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LANE Boys RC's Tamiya M1025 Hummer restoration Empty Re: LANE Boys RC's Tamiya M1025 Hummer restoration

Post by boolean21 Sat 13 Apr 2013 - 11:02

Nice work bro!
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LANE Boys RC's Tamiya M1025 Hummer restoration Empty Re: LANE Boys RC's Tamiya M1025 Hummer restoration

Post by qks57 Sat 13 Apr 2013 - 22:21

to improve the performance of the vehicle in trails, you might wanna consider doing limited slip diffs. i see that your diff gears are the same as TT-01/TL-01's, its easy to do.

all you need are HPI's differential tuning springs from the Cup Racer, and a drillbit for drilling out the centre of the spider gear mount.
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LANE Boys RC's Tamiya M1025 Hummer restoration Empty Re: LANE Boys RC's Tamiya M1025 Hummer restoration

Post by laneboysrc Sun 14 Apr 2013 - 20:17

qks57 wrote:to improve the performance of the vehicle in trails, you might wanna consider doing limited slip diffs. i see that your diff gears are the same as TT-01/TL-01's, its easy to do.

all you need are HPI's differential tuning springs from the Cup Racer, and a drillbit for drilling out the centre of the spider gear mount.

Thanks for the tip. In the Cup Racer the spring presses on the small spider gears. I assume when doing the mod for the Tamiya diff one has to put the springs on the larger bevel gears on the out drives -- because the small spiders in the Tamiya gear are 120 degrees apart, not 180 degrees as in the Cup Racer so getting the spring in there would be very hard.

cheers, Werner
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LANE Boys RC's Tamiya M1025 Hummer restoration Empty Part 3 - Chassis

Post by laneboysrc Sun 14 Apr 2013 - 20:21

With the body in good shape it was time to rebuild the chassis of our Tamiya M1025 Hummer. Like all Tamiya kits one begins with the differentials.

LANE Boys RC's Tamiya M1025 Hummer restoration 8644520038_221b840e65

The original kit contained a ball differential for the back and a gear differential for the front wheel.

For better durability on the trail we replaced the rear diff with a locked gear differential and bought a second gear differential for the front.

The following photo shows the ball differential (known as Manta Ray ball diff) on the left, and the (locked) gear diff on the right.

LANE Boys RC's Tamiya M1025 Hummer restoration 8644519984_a6068e2e4b

To lock the gear diff we used the locking plastic parts from a CC-01 gear set that we had spare. The inside gears are identical between the TA01 and the CC-01, but the outer gear is much larger on the CC-01.

With the diffs built next was assembly of the rear gear box. The housing is new as the original was so brittle that it brakes apart upon touching.

LANE Boys RC's Tamiya M1025 Hummer restoration 8643424355_cfa046dce5

We used a GPM Racing metal motor mount to hold the Mabuchi RS-540SH we salvaged from another Tamiya kit that we upgraded to brushless.

LANE Boys RC's Tamiya M1025 Hummer restoration 8643424291_3da047a0c4

The large gear in the next photo is basically the spur gear, which also drives the bevel gear that brings power to the front axle. The smaller idler gear is identical front and rear.

LANE Boys RC's Tamiya M1025 Hummer restoration 8644519774_903a1f108c

The rear gearbox has been closed up and the upper suspension arms have been mounted.

LANE Boys RC's Tamiya M1025 Hummer restoration 8643424159_cd628051cd

Next up is the rear suspension. All parts were re-used from the original car.

LANE Boys RC's Tamiya M1025 Hummer restoration 8643424057_310c55b384

With the suspension attached to the gearbox it is ready to connect to the chassis.

LANE Boys RC's Tamiya M1025 Hummer restoration 8643423979_5bf1f07554

The front gearbox is simpler than the rear. The new gear differential was installed.

Notice that the out-drives here in the front have a ring serving as identification marker, while the rear out-drives don't have this marker. The out-drives are different front and rear, so it is important to pay attention to this.

LANE Boys RC's Tamiya M1025 Hummer restoration 8644519526_c9f15aec96

The idler and bevel gears are greased up and installed, ready to close the gearbox.

LANE Boys RC's Tamiya M1025 Hummer restoration 8644519428_60fe868c33

A new front shock tower has been installed together with the original suspension upper arms.

LANE Boys RC's Tamiya M1025 Hummer restoration 8644519346_fa150d160f

Like in the back we re-used all original parts of the suspension as they were in good condition. The only difference is that we upgraded the plastic bushings to ball bearings throughout the vehicle.

LANE Boys RC's Tamiya M1025 Hummer restoration 8644519274_2d66d5ea99

In contrast to the rest of the suspension, the front lower arms are mounted with this U-shaped metal rod instead of special pin-screws.

LANE Boys RC's Tamiya M1025 Hummer restoration 8644519222_639196010c

With both axles being assembled the brand new chassis got the electronics installed.

We had an original Tamiya Servo TSU-03 lying around, perfect for this car. The ESC is an old TEU-101BK that had shoddy wiring, which got replaced. Since the TEU-101BK does not have a BEC I added a UBEC between the ESC/Receiver and battery compartment.

All wires were trimmed to the correct size to keep it compact and neat.

LANE Boys RC's Tamiya M1025 Hummer restoration 8644518732_a726a22b07

Next up is the steering assembly. It is a simple bell crank with a metal bar between the pivots. The pivots hinge on simple step screws.

LANE Boys RC's Tamiya M1025 Hummer restoration 8644444985_26660db8f4

The steering is very compact and low as the chassis has buggy origins.

LANE Boys RC's Tamiya M1025 Hummer restoration 8645542176_e23445eff3

The rear axle and gearbox gets bolted onto the chassis with four screws.

LANE Boys RC's Tamiya M1025 Hummer restoration 8645542090_ae015de859

The front gearbox bolts on in a similar fashion but has an one more screw holding it to the chassis. Note the thin drive shaft towards the front.

LANE Boys RC's Tamiya M1025 Hummer restoration 8645541966_04ba9efa1e

The horizontal bar above the shock tower is the front body mount. The body has two hooks that go under that bar. The front bumper captures the U-shaped suspension hinge pin.

LANE Boys RC's Tamiya M1025 Hummer restoration 8645541732_3821a07e4d

Bottom view of the completed chassis. The last thing to do is soldering the motor wires.

LANE Boys RC's Tamiya M1025 Hummer restoration 8644444283_7e81cce383

The completed chassis with battery installed. Looks like new, smells like new, drives like new.

LANE Boys RC's Tamiya M1025 Hummer restoration 8645541476_6283d218a1

I am really pleased how it turned out. A test drive at home showed that it runs very smooth and quiet.

The chassis was extremely easy to build compared to other Tamiya kits like the DB-01 or M-06. Almost all screws on the chassis are 3 x 10 mm self tapping screws, unlike more modern kit that use a large diversity of machine screws and self tapping screws.

Now only the detailing and finishing touches are left.
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LANE Boys RC's Tamiya M1025 Hummer restoration Empty Re: LANE Boys RC's Tamiya M1025 Hummer restoration

Post by boolean21 Sun 14 Apr 2013 - 21:55

Thanks for the detailed updates!!

Great work!
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LANE Boys RC's Tamiya M1025 Hummer restoration Empty The Hummer is running once again

Post by laneboysrc Sat 15 Jun 2013 - 21:09

It's actually ready since three weeks, but today finally I had time to make photos of the finished car.

LANE Boys RC's Tamiya M1025 Hummer restoration 9046557059_477a2c82ba

We found the original decal sheet on eBay for a low price, so we put on the original stickers. There are not many of them anyway.

LANE Boys RC's Tamiya M1025 Hummer restoration 9046560207_5e251f81ac


The headlamps, tail lights, indicators and UN signs were kindly made by the resident Johannes Gutenberg (thanks Boo! cheers). We made the lamps based on reference photos found on the Internet.

LANE Boys RC's Tamiya M1025 Hummer restoration 9046559121_d9d59d1ed8

Small details like the reflectors as well as the engine cover retainers were painted with a brush. Working on those fiddly details is very relaxing and ideal for those rainy evenings.

LANE Boys RC's Tamiya M1025 Hummer restoration 9048787952_cab1194a05

One of the biggest concerns was to show off the details on this nice Tamiya hard-plastic shell. The solution was simple: We traced all recesses gently with a sharp pencil and then sealed the body with flat clear spray paint. It makes all the small rivets, recesses and panel lines stick out nicely without drawing attention to it.

LANE Boys RC's Tamiya M1025 Hummer restoration 9048785714_5d8e953102

When putting the body on the chassis for the first time we realized that there was simply not enough space for the D-shackle mount we had built. So sadly we removed them.

LANE Boys RC's Tamiya M1025 Hummer restoration 9048784772_5f3f871e93

The mud flaps came from a damaged toy digger. There is one detail still missing: windscreen wipers!

LANE Boys RC's Tamiya M1025 Hummer restoration 9048785382_8f6606a7f8

The UN Peace Mission Hummer  flower  will be riding the trails of Singapore once more!
Maiden run tomorrow in Woodgrove! cheers



PS: After taking the photos in our local park Patrick took the car for a spin. A while later he came back with the car in his hands: it didn't move anymore. The drive train was blocked. confused
At home I found out that a washer had fallen into the motor, attracted by the magnet. The washer jammed the rotor and also cut some of the windings. The motor is toast: it still worked but gets hot immediately as some windings are shorted out and draw a lot of current. It also acts as a constant drag brake
Luckily we had a spare silver can around.

Lesson learned: keep motors neatly stored in separate packaging, not in the junk bin together with small metal parts. albino
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Post by oceanic Sat 15 Jun 2013 - 21:55

Great restoration work! 
Nice!
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LANE Boys RC's Tamiya M1025 Hummer restoration Empty Re: LANE Boys RC's Tamiya M1025 Hummer restoration

Post by boolean21 Sat 15 Jun 2013 - 23:17

nice updates!

great details!... 
i see that there are so many rivets and details to go through with the pencil!!
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