Usage:
3508 (23Z, 70Z),
3512 (24Z, 67Z),
And 3516 (25Z, 73Z) Generator Set Engines
Description of Change: New ether starting aid groups are available as either factory-installed or shipped loose attachments for the above engines. The automatic starting aid systems are designed to meter a controlled amount of starting fluid into the intake air when the jacket water temperature of the engine is below 13°C (55°C). This will improve starting and combustion during cold start-ups and will result in smoother operation and less smoke.
The system uses an engine coolant temperature switch to determine when ether should be used as a starting aid. When the engine is cranked and the engine coolant temperature switch senses the jacket water temperature is below 13°C (55°F), ether is injected into the engine intake air stream just after the turbocharger.
The ether injections are also controlled by a three-position toggle switch. The three switch positions are:
OFF: Ether will not be injected regardless of the engine coolant temperature.
AUTO: Ether will be injected as long as the starting motor is engaged and the engine coolant is below 13°C (55°F).
MANUAL: Ether will be injected as long as the switch is held in the "MANUAL" position, the engine is cranking or running, and the engine coolant temperature is below 13°C (55°F). (The manual position is normally used to improve engine combustion after the engine has started and is still cold.)
Adaptable To: The new ether starting aid groups are adaptable to first production. See Chart A for the list of new and former ether starting aid groups. See Illustrations 1 and 2 for the typical location of the parts in the new groups. See Illustration 3 and Chart B for the parts required for new ether starting aid groups.
NOTE: Do NOT clamp electrical wires on ether lines.
The 4P2571, 4P2572, and 4P2573 Ether Starting Aid Groups require a 24 volt DC system. For operation, either an electric starting motor or an electrically controlled air starting system is required. The groups CAN NOT be used with a hydro-mechanical shutoff, or installed on units with left handed instrument panels.
The 4P2730, 4P2731, and 4P2732 Ether Starting Aid Groups require a 24 volt DC system.
Illustration 1. Front view. Typical location of parts for ether starting aid groups. See Chart B for part description.
Illustration 2. Side view. See Chart B for part description.
Illustration 3. Wiring diagram for ether starting aid groups. Components inside the dashed lines are for 3516 Engines only.