diff --git a/src/main/java/com/iflytop/sgs/hardware/config/StepMotorConfig.java b/src/main/java/com/iflytop/sgs/hardware/config/StepMotorConfig.java
index 3e59749..3d7d751 100644
--- a/src/main/java/com/iflytop/sgs/hardware/config/StepMotorConfig.java
+++ b/src/main/java/com/iflytop/sgs/hardware/config/StepMotorConfig.java
@@ -35,7 +35,8 @@ public class StepMotorConfig {
     final static Map<StepMotorMId, Double> stepMotorMaxLimitMap = Map.ofEntries(
             Map.entry(StepMotorMId.DoorM, 200.0),
             Map.entry(StepMotorMId.LiquidM, 160.0),
-            Map.entry(StepMotorMId.ZM, 110.0)
+            Map.entry(StepMotorMId.ZM, 110.0),
+            Map.entry(StepMotorMId.LiquidPumpM, 9999999.0)
     );
 
     // 是否安装编码器