MTH Electric Trains | PA B-Unit | railking pa b unit diesel engine operating instructions

Thank you for purchasing the MTH Electric Trains production of the PA B
Unit diesel engine. The engine’s durable ABS body and Die-cast Trucks are
sized for operation on track diameters as small as O-31. The engine makes a
perfect compliment to RailKing PA AA Set. The PA B Unit’s
non-operating couplers are compatible with most 3-rail locomotives and
rolling stock.
The B Unit is prewired to be operated with the RailKing PA AA Set.
In order for the engine to perform correctly and quietly, it is important that
the chassis be lubricated before operation. Lubrication should include all
truck block bushings and pickup rollers to prevent them from squeaking.
Use light household oil and follow the lubrication points marked “L" in Fig.
1 below.
Periodically, check the locomotive wheels and for dirt buildup as this can
significantly affect the engine’s ability to perform properly. Dirty track and
dirty wheels can cause both poor electrical contact as well as poor traction,
especially on elevated track sections.
Body Mount Screws
Lubricate Wheel Axles (L)
Figure 1: Lubricating The Chassis
Body Mount Screws
Body Mount Screws
Before you operate your PA B Unit with the RailKing PA AA set see figure
2 for connecting the Proto-Coupler wiring harness.
Figure 2: Connecting the Proto-Coupler extension
Service & Warranty Information
How to Get Service Under the Terms of the Limited One-Year Warranty
For warranty repair, do not return your product to the place of purchase. Instead, follow the
instructions below to obtain warranty service as our dealer network is not prepared to service the
product under the terms of this warranty.
1. First, write, call or FAX M.T.H. Electric Trains, 7020 Columbia Gateway Drive, Columbia, MD
21046, (Tel 410-381-2580; FAX No.: 410-423-0009; e-mail:, stating
when it was purchased and what seems to be the problem. You will be given a return authorization
number to assure that your merchandise will be properly handled upon its receipt.
2. CAUTION: Make sure the product is packed in its original factory packaging including its foam
and plastic wrapping material so as to prevent damage to the merchandise. The shipment must be
prepaid and we recommend that it be insured. A cover letter including your name, address, daytime
phone number, e-mail address (if available), Return Authorization number, a copy of your sales
receipt and a full description of the problem must be included to facilitate the repairs. Please include
the description regardless of whether you discussed the problem with one of our service technicians
when contacting M.T.H. for your Return Authorization number.
3. Please make sure you have followed the instructions carefully before returning any merchandise
for service.
Limited One-Year Warranty
All M.T.H. products purchased from an Authorized M.T.H. Train Merchant are covered by this
See our website at or call 1-888-640-3700 to identify an Authorized M.T.H.
Train Merchant near you.
M.T.H. products are warrantied for one year from the date of purchase against defects in material or
workmanship, excluding light bulbs and traction tires. We will repair or replace (at our option) the
defective part without charge for the parts or labor, if the item is returned to M.T.H. Electric Trains
within one year of the original date of purchase. This warranty does not cover damages caused by
improper care, handling, or use. Transportation costs incurred by the customer are not covered under
this warranty.
Items sent for repair must be accompanied by a return authorization number, a description of the
problem, and a copy of the original sales receipt from an Authorized M.T.H. Train Merchant, which
gives the date of purchase. Call 410-381-2580, fax 410-423-0009, or e-mail the Service Department at to obtain a return authorization number.
This warranty gives you specific legal rights, and you may have other rights that vary from state t o state.
Service Department
M.T.H. Electric Trains
7020 Columbia Gateway Drive
Columbia MD 21046-1532
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