PASCO TD-8551A MECHANICAL EQUIVALENT OF HEAT - Manual (Page 12)

Mechanical Equivalent of Heat 012-04331E
8
Maintenance
The Mechanical Equivalent of Heat apparatus requires no
regular maintenance except to lubricate the aluminum
cylinder periodically to ensure that the friction rope slides
freely.
If the slip-ring or brushes become dirty enough so they
do not conduct well and affect the thermistor resistance,
just clean them with alcohol (if you have no alcohol
handy, a damp rag will probably do the trick).
Part No. Description
648-04336 Friction Cylinder
555-04303 Commutator PCB
150-027 Thermistor 100K +/- 2°C
620-039 Cylinder Handscrew
003-02861 Brush Assembly
621-020 Crank Handle
699-050 Mechanical Counter
003-04382 Cord Assembly
Assorted Replacement Parts List