Belts & propane furnace

[williamcharrison]

Is there any way to tighten engine belts without removing
the back bumper to swing the radiator out on my 90 SP36?

Also, just returned from a chilly trip where only the front propane
furnace worked. The rear elec heater and rear propane furnace do
not although the elec heater in the bathroom does. The schematic
I have refers to a Primus furnace but I don't have a Primus.

William C Harrison
Akron, Ohio
90 WLSP36