Description
For Sale: All Nation F3/F7 or GP Engine Helix Gearing Tower Drive Transmission 40″ Wheels Assembled (with /without Bearings/Universal Jt CHOOSE) PN#378ANwith or 378Without
Brand new replacement tower drive transmission for F3/F7 or GP engines to run on 2 rail DC track.
Note in your order if you want a specific upper drive shaft connector. The upper drive shaft is available in 3 configurations:
(1) The original default dog bone & pin
(2) Straight shaft for the larger universal joint connection with a 4 mm ID.
(3) Straight shaft for the smaller universal joint connection with a 3 mm ID.
The above gives the modeler a wide array of choices regarding the connections to the motor shaft.
Not previously offered by AN were options for using these drives in many different applications and not just in the specific F3/F7 or Switch engines. Consequently, the photos show the longer drive shafts on either or both ends of the transmissions and can be cut to length. As an example, the shaft on the opposite side of the spline side of the small gear box may be used as the power take off for powering the truck on the other end of the engine.The modeler can cut these shafts to length or we can ship the transmissions already cut close to the end of the gear box for truck frame clearance purposes.
As shown in the photo, the end of the axles are machined to accommodate a 2.5mm ball bearing with an approximate ID of 1.87 mm. Consequently, if the drive is to replace an original All-Nation set in a Blomberg truck with the bronze spherical journal bushings, the Part Number 378AN is available at 2.34mm for the 3/32″ bushing.
Re-engineered with Poly-carbonate 4038 and 4039 gear box panels for a more quiet drive in the tower and small gear unit, respectively, with further enhancements.
In order to use this replacement product to update an existing drive mechanism in your non-All-Nation sideframes, journals must be able to take the ball bearings and clearances for the drive shafts and should be verified before purchasing this item.
Note, there are gear box covers on each axle. A highly asked for feature was the ability to totally take apart the transmissions for servicing and or fine tuning with shim washers and future maintenance. Thus, the spacer bushings on the drive shafts are tapped for 3-48 screws as opposed to the old means of mounting the side panels.
We are confident that our changes and improvements will give decades of running service in your locomotives. However, mechanisms still need periodic lubrication as most modelers know already.
PARTS LIST: PN#4062 Constant Torque Transmission Blueprint Section B (aka small gear box)
1 #4047 drive shaft with 1 #4051 worm gear mounted on the shaft.
2 #4039 gear box sides
4 3-48 x 5/32″ Filister Head #C1301 screws with (lock washers #C2034 or C2031) (may substitute Pan Head type)
2 #4040 spacer bushings
1 #4048 shaft pin for spline connection
1 #4052 brass worm gears mounted on the axle
1 #1524 standard axle
2 #4073 brass axle bushings
2 40″ wheels PN#2146 and PN#2147 (note may be substituted for 33″ or 36″ wheels)
2 Thrust Washers aka Shim Rings
2 Thrust axle thrust washers (maybe Polycarbonate or fiber washers)
2 Bottom Spur Gear Pan 3D Print PN#253AN
4 Gear Pan Retainers
8 0-90 Hex machine screws for the Gear Pan and Retainers
PARTS LIST: PN#4056 Constant Torque Transmission Blueprint Section A
1 Drive Shaft PN#4045 1-1/4″ Long plus pin
4 Spacer Bushings For Drive Shafts PN#4040
1 Spur Gear i.e. Worm Gear for Axle PN#4052
2 Brass Axle Bushings PN#4073
1 Standard Axle PN#1524 (Please specify if using ball bearings in the journal box as diameter is smaller)
8 3-48 x 5/32″ Filister Head #C1301 (may substitute Pan Head type)
8 Lock Washers #C2034 or C2031
4 Thrust Washers aka Shim Rings for drive shaft tuning
2 Thrust Washer for axles maybe (Polycarbonate or fiber washers)
2 40″ wheels PN#2146 and PN#2147 (note may be substituted for 33″ or 36″ wheels)
3 Wheel Insulators (1 is a spare)
1 Worm #4051 (Worm may already be pressed onto shaft PN#4045)
2 Gear housing Side Panels PN#4038
1 Bottom Spur Gear Pan 3D Print PN#253AN
1 Upper Drive Shaft with ball #4042 (options available for universal connectors)
1 Lower Drive Shaft Spline #4041
1 Steel Helix Gear, Upper Drive Shaft #4049 to be mounted on #4042
1 Brass Helix Gear, Lower Drive Shaft #4050 to be mounted on #4041 spline
1 Upper Drive Shaft C Clip #C2036
